20128888274515 has 16 divisors (see below), whose sum is σ = 24242430481632. Its totient is φ = 16044603623424.

The previous prime is 20128888274491. The next prime is 20128888274549. The reversal of 20128888274515 is 51547288882102.

It is a cyclic number.

It is not a de Polignac number, because 20128888274515 - 2⁹ = 20128888274003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69919347 + ... + 70206643.

It is an arithmetic number, because the mean of its divisors is an integer number (1515151905102).

Almost surely, 2^{20128888274515} is an apocalyptic number.

20128888274515 is a deficient number, since it is larger than the sum of its proper divisors (4113542207117).

20128888274515 is a wasteful number, since it uses less digits than its factorization.

20128888274515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338166.

The product of its (nonzero) digits is 22937600, while the sum is 61.

The spelling of 20128888274515 in words is "twenty trillion, one hundred twenty-eight billion, eight hundred eighty-eight million, two hundred seventy-four thousand, five hundred fifteen".