20932643007 has 12 divisors (see below), whose sum is σ = 31827410680. Its totient is φ = 13220616528.

The previous prime is 20932642979. The next prime is 20932643009. The reversal of 20932643007 is 70034623902.

It is a happy number.

20932643007 is a `hidden beast` number, since 2 + 0 + 9 + 3 + 2 + 643 + 0 + 0 + 7 = 666.

It is not a de Polignac number, because 20932643007 - 2⁷ = 20932642879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20932643009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61206388 + ... + 61206729.

Almost surely, 2^20932643007 is an apocalyptic number.

20932643007 is a deficient number, since it is larger than the sum of its proper divisors (10894767673).

20932643007 is a wasteful number, since it uses less digits than its factorization.

20932643007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122413142 (or 122413139 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 20932643007 in words is "twenty billion, nine hundred thirty-two million, six hundred forty-three thousand, seven".