20709887037 has 16 divisors (see below), whose sum is σ = 31564570752. Its totient is φ = 11831728320.

The previous prime is 20709886943. The next prime is 20709887039. The reversal of 20709887037 is 73078890702.

It is not a de Polignac number, because 20709887037 - 2¹⁴ = 20709870653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20709887039) by changing a digit.

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, 643 + ... + 203519.

It is an arithmetic number, because the mean of its divisors is an integer number (1972785672).

Almost surely, 2^20709887037 is an apocalyptic number.

It is an amenable number.

20709887037 is a deficient number, since it is larger than the sum of its proper divisors (10854683715).

20709887037 is a wasteful number, since it uses less digits than its factorization.

20709887037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207748.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 20709887037 in words is "twenty billion, seven hundred nine million, eight hundred eighty-seven thousand, thirty-seven".