19442430 has 128 divisors (see below), whose sum is σ = 60456960. Its totient is φ = 4408992.

The previous prime is 19442419. The next prime is 19442431. The reversal of 19442430 is 3424491.

19442430 is a `hidden beast` number, since 194 + 42 + 430 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 19442394 and 19442403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 153027 + ... + 153153.

It is an arithmetic number, because the mean of its divisors is an integer number (472320).

Almost surely, 2^19442430 is an apocalyptic number.

19442430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19442430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30228480).

19442430 is an abundant number, since it is smaller than the sum of its proper divisors (41014530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19442430 is an equidigital number, since it uses as much as digits as its factorization.

19442430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 19442430 is about 4409.3570959948. The cubic root of 19442430 is about 268.8954878385.

It can be divided in two parts, 194 and 42430, that added together give a palindrome (42624).

The spelling of 19442430 in words is "nineteen million, four hundred forty-two thousand, four hundred thirty".