23975021811 has 16 divisors (see below), whose sum is σ = 34462465184. Its totient is φ = 14738091264.

The previous prime is 23975021803. The next prime is 23975021813. The reversal of 23975021811 is 11812057932.

It is a happy number.

It is not a de Polignac number, because 23975021811 - 2³ = 23975021803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23975021811.

It is not an unprimeable number, because it can be changed into a prime (23975021813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291496 + ... + 364581.

It is an arithmetic number, because the mean of its divisors is an integer number (2153904074).

Almost surely, 2^23975021811 is an apocalyptic number.

23975021811 is a deficient number, since it is larger than the sum of its proper divisors (10487443373).

23975021811 is a wasteful number, since it uses less digits than its factorization.

23975021811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657030.

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 23975021811 in words is "twenty-three billion, nine hundred seventy-five million, twenty-one thousand, eight hundred eleven".