20423406964 has 24 divisors (see below), whose sum is σ = 38638883360. Its totient is φ = 9412778016.

The previous prime is 20423406959. The next prime is 20423407003. The reversal of 20423406964 is 46960432402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628662 + ... + 3634285.

Almost surely, 2^20423406964 is an apocalyptic number.

It is an amenable number.

20423406964 is a deficient number, since it is larger than the sum of its proper divisors (18215476396).

20423406964 is a wasteful number, since it uses less digits than its factorization.

20423406964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7263007 (or 7263005 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 20423406964 in words is "twenty billion, four hundred twenty-three million, four hundred six thousand, nine hundred sixty-four".