19944330 has 64 divisors (see below), whose sum is σ = 55496448. Its totient is φ = 4492800.

The previous prime is 19944317. The next prime is 19944343. The reversal of 19944330 is 3344991.

It is an interprime number because it is at equal distance from previous prime (19944317) and next prime (19944343).

It is a junction number, because it is equal to n+sod(n) for n = 19944291 and 19944300.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14680 + ... + 15980.

It is an arithmetic number, because the mean of its divisors is an integer number (867132).

Almost surely, 2^19944330 is an apocalyptic number.

19944330 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 19944330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27748224).

19944330 is an abundant number, since it is smaller than the sum of its proper divisors (35552118).

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

19944330 is a wasteful number, since it uses less digits than its factorization.

19944330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 19944330 is about 4465.9075225535. The cubic root of 19944330 is about 271.1896749056.

The spelling of 19944330 in words is "nineteen million, nine hundred forty-four thousand, three hundred thirty".