23667071021 has 4 divisors (see below), whose sum is σ = 25818622944. Its totient is φ = 21515519100.

The previous prime is 23667071017. The next prime is 23667071063. The reversal of 23667071021 is 12017076632.

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 a cyclic number.

It is not a de Polignac number, because 23667071021 - 2² = 23667071017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23667071081) 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, 1075775945 + ... + 1075775966.

It is an arithmetic number, because the mean of its divisors is an integer number (6454655736).

Almost surely, 2^23667071021 is an apocalyptic number.

It is an amenable number.

23667071021 is a deficient number, since it is larger than the sum of its proper divisors (2151551923).

23667071021 is a wasteful number, since it uses less digits than its factorization.

23667071021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151551922.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 23667071021 in words is "twenty-three billion, six hundred sixty-seven million, seventy-one thousand, twenty-one".