19930430 has 32 divisors (see below), whose sum is σ = 40672800. Its totient is φ = 6970752.

The previous prime is 19930429. The next prime is 19930433. The reversal of 19930430 is 3403991.

19930430 = 137² + 138² + ... + 396².

It is a junction number, because it is equal to n+sod(n) for n = 19930393 and 19930402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19930433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1565 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (1271025).

Almost surely, 2^19930430 is an apocalyptic number.

19930430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19930430 is an abundant number, since it is smaller than the sum of its proper divisors (20742370).

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

19930430 is a wasteful number, since it uses less digits than its factorization.

19930430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8108.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 19930430 is about 4464.3510166652. The cubic root of 19930430 is about 271.1266592927.

The spelling of 19930430 in words is "nineteen million, nine hundred thirty thousand, four hundred thirty".