20423064663 has 24 divisors (see below), whose sum is σ = 29667924000. Its totient is φ = 13537952064.

The previous prime is 20423064653. The next prime is 20423064703. The reversal of 20423064663 is 36646032402.

20423064663 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 3 + 0 + 646 + 6 + 3 = 666.

It is not a de Polignac number, because 20423064663 - 2⁸ = 20423064407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423064653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4517118 + ... + 4521636.

It is an arithmetic number, because the mean of its divisors is an integer number (1236163500).

Almost surely, 2^20423064663 is an apocalyptic number.

20423064663 is a deficient number, since it is larger than the sum of its proper divisors (9244859337).

20423064663 is a wasteful number, since it uses less digits than its factorization.

20423064663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7271 (or 7268 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 20423064663 in words is "twenty billion, four hundred twenty-three million, sixty-four thousand, six hundred sixty-three".