21229914792 has 16 divisors (see below), whose sum is σ = 53074787040. Its totient is φ = 7076638256.

The previous prime is 21229914781. The next prime is 21229914793. The reversal of 21229914792 is 29741992212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21229914793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442289868 + ... + 442289915.

It is an arithmetic number, because the mean of its divisors is an integer number (3317174190).

Almost surely, 2^21229914792 is an apocalyptic number.

It is an amenable number.

21229914792 is an abundant number, since it is smaller than the sum of its proper divisors (31844872248).

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

21229914792 is a wasteful number, since it uses less digits than its factorization.

21229914792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884579792 (or 884579788 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The spelling of 21229914792 in words is "twenty-one billion, two hundred twenty-nine million, nine hundred fourteen thousand, seven hundred ninety-two".