19321233428 has 24 divisors (see below), whose sum is σ = 38673230400. Its totient is φ = 8273936448.

The previous prime is 19321233403. The next prime is 19321233457. The reversal of 19321233428 is 82433212391.

It is a super-2 number, since 2×19321233428² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19321233391 and 19321233400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238793 + ... + 309296.

It is an arithmetic number, because the mean of its divisors is an integer number (1611384600).

Almost surely, 2^19321233428 is an apocalyptic number.

It is an amenable number.

19321233428 is an abundant number, since it is smaller than the sum of its proper divisors (19351996972).

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

19321233428 is a wasteful number, since it uses less digits than its factorization.

19321233428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549359 (or 549357 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The spelling of 19321233428 in words is "nineteen billion, three hundred twenty-one million, two hundred thirty-three thousand, four hundred twenty-eight".