20513342722115 has 32 divisors (see below), whose sum is σ = 24887193656832. Its totient is φ = 16230313440000.

The previous prime is 20513342722111. The next prime is 20513342722207. The reversal of 20513342722115 is 51122724331502.

It is not a de Polignac number, because 20513342722115 - 2² = 20513342722111 is a prime.

It is a super-2 number, since 2×20513342722115² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20513342722111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1381269440 + ... + 1381284290.

It is an arithmetic number, because the mean of its divisors is an integer number (777724801776).

Almost surely, 2^{20513342722115} is an apocalyptic number.

20513342722115 is a deficient number, since it is larger than the sum of its proper divisors (4373850934717).

20513342722115 is a wasteful number, since it uses less digits than its factorization.

20513342722115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18251.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 20513342722115 in words is "twenty trillion, five hundred thirteen billion, three hundred forty-two million, seven hundred twenty-two thousand, one hundred fifteen".