20231640423 has 12 divisors (see below), whose sum is σ = 29300592360. Its totient is φ = 13452170256.

The previous prime is 20231640421. The next prime is 20231640427. The reversal of 20231640423 is 32404613202.

20231640423 is a `hidden beast` number, since 2 + 0 + 231 + 6 + 4 + 0 + 423 = 666.

It is not a de Polignac number, because 20231640423 - 2¹ = 20231640421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231640421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2962236 + ... + 2969057.

It is an arithmetic number, because the mean of its divisors is an integer number (2441716030).

Almost surely, 2^20231640423 is an apocalyptic number.

20231640423 is a deficient number, since it is larger than the sum of its proper divisors (9068951937).

20231640423 is a wasteful number, since it uses less digits than its factorization.

20231640423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5931678 (or 5931675 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

It can be divided in two parts, 202 and 31640423, that added together give a 4-th power (31640625 = 75⁴).

The spelling of 20231640423 in words is "twenty billion, two hundred thirty-one million, six hundred forty thousand, four hundred twenty-three".