20540756015 has 12 divisors (see below), whose sum is σ = 26690829624. Its totient is φ = 15168557664.

The previous prime is 20540756011. The next prime is 20540756029. The reversal of 20540756015 is 51065704502.

It is not a de Polignac number, because 20540756015 - 2² = 20540756011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540756011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12153449 + ... + 12155138.

It is an arithmetic number, because the mean of its divisors is an integer number (2224235802).

Almost surely, 2^20540756015 is an apocalyptic number.

20540756015 is a deficient number, since it is larger than the sum of its proper divisors (6150073609).

20540756015 is a wasteful number, since it uses less digits than its factorization.

20540756015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24308618 (or 24308605 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 20540756015 in words is "twenty billion, five hundred forty million, seven hundred fifty-six thousand, fifteen".