20512600423 has 4 divisors (see below), whose sum is σ = 23442971920. Its totient is φ = 17582228928.

The previous prime is 20512600411. The next prime is 20512600447. The reversal of 20512600423 is 32400621502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20512600423 - 2²⁵ = 20479045991 is a prime.

It is a super-2 number, since 2×20512600423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512600463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1465185738 + ... + 1465185751.

It is an arithmetic number, because the mean of its divisors is an integer number (5860742980).

Almost surely, 2^20512600423 is an apocalyptic number.

20512600423 is a deficient number, since it is larger than the sum of its proper divisors (2930371497).

20512600423 is an equidigital number, since it uses as much as digits as its factorization.

20512600423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930371496.

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 20512600423 in words is "twenty billion, five hundred twelve million, six hundred thousand, four hundred twenty-three".