23218503880 has 128 divisors (see below), whose sum is σ = 64605340800. Its totient is φ = 7383398400.

The previous prime is 23218503863. The next prime is 23218503883. The reversal of 23218503880 is 8830581232.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (23218503883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1860 + ... + 215500.

It is an arithmetic number, because the mean of its divisors is an integer number (504729225).

Almost surely, 2^23218503880 is an apocalyptic number.

23218503880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23218503880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32302670400).

23218503880 is an abundant number, since it is smaller than the sum of its proper divisors (41386836920).

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

23218503880 is a wasteful number, since it uses less digits than its factorization.

23218503880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213695 (or 213691 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 23218503880 in words is "twenty-three billion, two hundred eighteen million, five hundred three thousand, eight hundred eighty".