23420776117515 has 128 divisors (see below), whose sum is σ = 47965515558912. Its totient is φ = 9506676326400.

The previous prime is 23420776117511. The next prime is 23420776117631. The reversal of 23420776117515 is 51571167702432.

It is not a de Polignac number, because 23420776117515 - 2² = 23420776117511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (23420776117511) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 910336 + ... + 6904365.

It is an arithmetic number, because the mean of its divisors is an integer number (374730590304).

Almost surely, 2^{23420776117515} is an apocalyptic number.

23420776117515 is an abundant number, since it is smaller than the sum of its proper divisors (24544739441397).

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

23420776117515 is a wasteful number, since it uses less digits than its factorization.

23420776117515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7814829.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 23420776117515 in words is "twenty-three trillion, four hundred twenty billion, seven hundred seventy-six million, one hundred seventeen thousand, five hundred fifteen".