23172121710 has 128 divisors (see below), whose sum is σ = 62286174720. Its totient is φ = 6130080000.

The previous prime is 23172121703. The next prime is 23172121717. The reversal of 23172121710 is 1712127132.

It is an interprime number because it is at equal distance from previous prime (23172121703) and next prime (23172121717).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23172121717) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22431354 + ... + 22432386.

It is an arithmetic number, because the mean of its divisors is an integer number (486610740).

Almost surely, 2^23172121710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23172121710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31143087360).

23172121710 is an abundant number, since it is smaller than the sum of its proper divisors (39114053010).

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

23172121710 is a wasteful number, since it uses less digits than its factorization.

23172121710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

Adding to 23172121710 its reverse (1712127132), we get a palindrome (24884248842).

The spelling of 23172121710 in words is "twenty-three billion, one hundred seventy-two million, one hundred twenty-one thousand, seven hundred ten".