23447642121 has 12 divisors (see below), whose sum is σ = 34332773748. Its totient is φ = 15417627264.

The previous prime is 23447642087. The next prime is 23447642131. The reversal of 23447642121 is 12124674432.

23447642121 is a `hidden beast` number, since 2 + 3 + 4 + 4 + 7 + 642 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18972032121 + 4475610000 = 137739^2 + 66900^2 .

It is not a de Polignac number, because 23447642121 - 2¹⁴ = 23447625737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23447642131) 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, 17843820 + ... + 17845133.

It is an arithmetic number, because the mean of its divisors is an integer number (2861064479).

Almost surely, 2^23447642121 is an apocalyptic number.

It is an amenable number.

23447642121 is a deficient number, since it is larger than the sum of its proper divisors (10885131627).

23447642121 is a wasteful number, since it uses less digits than its factorization.

23447642121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35689032 (or 35689029 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The spelling of 23447642121 in words is "twenty-three billion, four hundred forty-seven million, six hundred forty-two thousand, one hundred twenty-one".