23895532981 has 4 divisors (see below), whose sum is σ = 24083686912. Its totient is φ = 23707379052.

The previous prime is 23895532901. The next prime is 23895532993. The reversal of 23895532981 is 18923559832.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23895532981 - 2¹³ = 23895524789 is a prime.

It is a super-2 number, since 2×23895532981² (a number of 22 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 (23895532901) 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, 94076775 + ... + 94077028.

It is an arithmetic number, because the mean of its divisors is an integer number (6020921728).

Almost surely, 2^23895532981 is an apocalyptic number.

It is an amenable number.

23895532981 is a deficient number, since it is larger than the sum of its proper divisors (188153931).

23895532981 is a wasteful number, since it uses less digits than its factorization.

23895532981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188153930.

The product of its digits is 4665600, while the sum is 55.

The spelling of 23895532981 in words is "twenty-three billion, eight hundred ninety-five million, five hundred thirty-two thousand, nine hundred eighty-one".