20672229939 has 16 divisors (see below), whose sum is σ = 27636380928. Its totient is φ = 13744815392.

The previous prime is 20672229923. The next prime is 20672229943. The reversal of 20672229939 is 93992227602.

It is a cyclic number.

It is not a de Polignac number, because 20672229939 - 2⁴ = 20672229923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20672229891 and 20672229900.

It is not an unprimeable number, because it can be changed into a prime (20672222939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5275609 + ... + 5279525.

It is an arithmetic number, because the mean of its divisors is an integer number (1727273808).

Almost surely, 2^20672229939 is an apocalyptic number.

20672229939 is a deficient number, since it is larger than the sum of its proper divisors (6964150989).

20672229939 is a wasteful number, since it uses less digits than its factorization.

20672229939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8154.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The spelling of 20672229939 in words is "twenty billion, six hundred seventy-two million, two hundred twenty-nine thousand, nine hundred thirty-nine".