21232318692 has 48 divisors (see below), whose sum is σ = 53523585920. Its totient is φ = 6512133888.

The previous prime is 21232318649. The next prime is 21232318703. The reversal of 21232318692 is 29681323212.

It is a super-2 number, since 2×21232318692² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 21232318692.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168592 + ... + 266247.

Almost surely, 2^21232318692 is an apocalyptic number.

It is an amenable number.

21232318692 is an abundant number, since it is smaller than the sum of its proper divisors (32291267228).

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

21232318692 is a wasteful number, since it uses less digits than its factorization.

21232318692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435172 (or 435170 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The spelling of 21232318692 in words is "twenty-one billion, two hundred thirty-two million, three hundred eighteen thousand, six hundred ninety-two".