20541112515 has 128 divisors (see below), whose sum is σ = 47925043200. Its totient is φ = 8087195520.

The previous prime is 20541112499. The next prime is 20541112549. The reversal of 20541112515 is 51521114502.

It is a happy number.

20541112515 is a `hidden beast` number, since 2 + 0 + 541 + 112 + 5 + 1 + 5 = 666.

It is not a de Polignac number, because 20541112515 - 2⁴ = 20541112499 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 145504 + ... + 249506.

It is an arithmetic number, because the mean of its divisors is an integer number (374414400).

Almost surely, 2^20541112515 is an apocalyptic number.

20541112515 is an abundant number, since it is smaller than the sum of its proper divisors (27383930685).

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

20541112515 is a wasteful number, since it uses less digits than its factorization.

20541112515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104054 (or 104048 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 20541112515 in words is "twenty billion, five hundred forty-one million, one hundred twelve thousand, five hundred fifteen".