21423511692 has 96 divisors (see below), whose sum is σ = 60620313600. Its totient is φ = 6488913600.

The previous prime is 21423511679. The next prime is 21423511709. The reversal of 21423511692 is 29611532412.

21423511692 is a `hidden beast` number, since 2 + 142 + 351 + 169 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 4843642 + ... + 4848062.

It is an arithmetic number, because the mean of its divisors is an integer number (631461600).

Almost surely, 2^21423511692 is an apocalyptic number.

21423511692 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21423511692 is an abundant number, since it is smaller than the sum of its proper divisors (39196801908).

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

21423511692 is a wasteful number, since it uses less digits than its factorization.

21423511692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524 (or 8516 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 21423511692 in words is "twenty-one billion, four hundred twenty-three million, five hundred eleven thousand, six hundred ninety-two".