20669431932 has 30 divisors (see below), whose sum is σ = 54033978768. Its totient is φ = 6889810536.

The previous prime is 20669431907. The next prime is 20669431943. The reversal of 20669431932 is 23913496602.

20669431932 is a `hidden beast` number, since 206 + 6 + 9 + 431 + 9 + 3 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 31896948 + ... + 31897595.

Almost surely, 2^20669431932 is an apocalyptic number.

It is an amenable number.

20669431932 is an abundant number, since it is smaller than the sum of its proper divisors (33364546836).

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

20669431932 is a wasteful number, since it uses less digits than its factorization.

20669431932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63794559 (or 63794548 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 20669431932 in words is "twenty billion, six hundred sixty-nine million, four hundred thirty-one thousand, nine hundred thirty-two".