23477216721 has 8 divisors (see below), whose sum is σ = 35774806464. Its totient is φ = 13415552400.

The previous prime is 23477216687. The next prime is 23477216747. The reversal of 23477216721 is 12761277432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23477216721 - 2²⁵ = 23443662289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23477215721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558981330 + ... + 558981371.

It is an arithmetic number, because the mean of its divisors is an integer number (4471850808).

Almost surely, 2^23477216721 is an apocalyptic number.

23477216721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23477216721 is a deficient number, since it is larger than the sum of its proper divisors (12297589743).

23477216721 is a wasteful number, since it uses less digits than its factorization.

23477216721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117962711.

The product of its digits is 197568, while the sum is 42.

The spelling of 23477216721 in words is "twenty-three billion, four hundred seventy-seven million, two hundred sixteen thousand, seven hundred twenty-one".