23121716408 has 16 divisors (see below), whose sum is σ = 49546535280. Its totient is φ = 9909307008.

The previous prime is 23121716407. The next prime is 23121716447. The reversal of 23121716408 is 80461712132.

It is a super-2 number, since 2×23121716408² (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 (23121716407) 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, 206443841 + ... + 206443952.

It is an arithmetic number, because the mean of its divisors is an integer number (3096658455).

Almost surely, 2^23121716408 is an apocalyptic number.

23121716408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

23121716408 is an abundant number, since it is smaller than the sum of its proper divisors (26424818872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23121716408 is a wasteful number, since it uses less digits than its factorization.

23121716408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412887806 (or 412887802 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 23121716408 in words is "twenty-three billion, one hundred twenty-one million, seven hundred sixteen thousand, four hundred eight".