23486166981 has 12 divisors (see below), whose sum is σ = 34751889900. Its totient is φ = 15275555520.

The previous prime is 23486166973. The next prime is 23486166989. The reversal of 23486166981 is 18966168432.

23486166981 is a `hidden beast` number, since 23 + 486 + 1 + 6 + 69 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (23486166973) and next prime (23486166989).

It can be written as a sum of positive squares in 2 ways, for example, as 13691106081 + 9795060900 = 117009^2 + 98970^2 .

It is not a de Polignac number, because 23486166981 - 2³ = 23486166973 is a prime.

It is a super-2 number, since 2×23486166981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23486166989) 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, 31823706 + ... + 31824443.

It is an arithmetic number, because the mean of its divisors is an integer number (2895990825).

Almost surely, 2^23486166981 is an apocalyptic number.

It is an amenable number.

23486166981 is a deficient number, since it is larger than the sum of its proper divisors (11265722919).

23486166981 is a wasteful number, since it uses less digits than its factorization.

23486166981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63648196 (or 63648193 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 23486166981 in words is "twenty-three billion, four hundred eighty-six million, one hundred sixty-six thousand, nine hundred eighty-one".