20715607155 has 16 divisors (see below), whose sum is σ = 33383427840. Its totient is φ = 10968838368.

The previous prime is 20715607127. The next prime is 20715607277. The reversal of 20715607155 is 55170651702.

It is not a de Polignac number, because 20715607155 - 2¹² = 20715603059 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4965687 + ... + 4969856.

It is an arithmetic number, because the mean of its divisors is an integer number (2086464240).

Almost surely, 2^20715607155 is an apocalyptic number.

20715607155 is a deficient number, since it is larger than the sum of its proper divisors (12667820685).

20715607155 is a wasteful number, since it uses less digits than its factorization.

20715607155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9935690.

The product of its (nonzero) digits is 73500, while the sum is 39.

The spelling of 20715607155 in words is "twenty billion, seven hundred fifteen million, six hundred seven thousand, one hundred fifty-five".