23106405515220 has 144 divisors (see below), whose sum is σ = 74231832100608. Its totient is φ = 6030607904640.

The previous prime is 23106405515117. The next prime is 23106405515359. The reversal of 23106405515220 is 2251550460132.

23106405515220 is a `hidden beast` number, since 2 + 3 + 1 + 0 + 640 + 5 + 5 + 1 + 5 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50350351 + ... + 50807190.

It is an arithmetic number, because the mean of its divisors is an integer number (515498834032).

Almost surely, 2^{23106405515220} is an apocalyptic number.

23106405515220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23106405515220 is an abundant number, since it is smaller than the sum of its proper divisors (51125426585388).

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

23106405515220 is a wasteful number, since it uses less digits than its factorization.

23106405515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101157612 (or 101157598 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 23106405515220 its reverse (2251550460132), we get a palindrome (25357955975352).

The spelling of 23106405515220 in words is "twenty-three trillion, one hundred six billion, four hundred five million, five hundred fifteen thousand, two hundred twenty".