20936511315 has 32 divisors (see below), whose sum is σ = 37260244800. Its totient is φ = 11154205440.

The previous prime is 20936511287. The next prime is 20936511319. The reversal of 20936511315 is 51311563902.

It is a happy number.

20936511315 is a `hidden beast` number, since 20 + 93 + 6 + 511 + 31 + 5 = 666.

It is not a de Polignac number, because 20936511315 - 2⁸ = 20936511059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20936511315.

It is not an unprimeable number, because it can be changed into a prime (20936511319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44631 + ... + 209439.

It is an arithmetic number, because the mean of its divisors is an integer number (1164382650).

Almost surely, 2^20936511315 is an apocalyptic number.

20936511315 is a deficient number, since it is larger than the sum of its proper divisors (16323733485).

20936511315 is a wasteful number, since it uses less digits than its factorization.

20936511315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165764 (or 165758 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The spelling of 20936511315 in words is "twenty billion, nine hundred thirty-six million, five hundred eleven thousand, three hundred fifteen".