20516607423 has 32 divisors (see below), whose sum is σ = 32793196800. Its totient is φ = 12602405088.

The previous prime is 20516607373. The next prime is 20516607439. The reversal of 20516607423 is 32470661502.

20516607423 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 6 + 607 + 42 + 3 = 666.

It is not a de Polignac number, because 20516607423 - 2¹⁰ = 20516606399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516603423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138568 + ... + 245426.

It is an arithmetic number, because the mean of its divisors is an integer number (1024787400).

Almost surely, 2^20516607423 is an apocalyptic number.

20516607423 is a deficient number, since it is larger than the sum of its proper divisors (12276589377).

20516607423 is a wasteful number, since it uses less digits than its factorization.

20516607423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107428 (or 107422 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20516607423 in words is "twenty billion, five hundred sixteen million, six hundred seven thousand, four hundred twenty-three".