20007515836 has 24 divisors (see below), whose sum is σ = 43652762496. Its totient is φ = 7795135920.

The previous prime is 20007515719. The next prime is 20007515837. The reversal of 20007515836 is 63851570002.

It is a junction number, because it is equal to n+sod(n) for n = 20007515795 and 20007515804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007515837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32479426 + ... + 32480041.

It is an arithmetic number, because the mean of its divisors is an integer number (1818865104).

Almost surely, 2^20007515836 is an apocalyptic number.

It is an amenable number.

20007515836 is an abundant number, since it is smaller than the sum of its proper divisors (23645246660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20007515836 is a wasteful number, since it uses less digits than its factorization.

20007515836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64959489 (or 64959487 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 20007515836 in words is "twenty billion, seven million, five hundred fifteen thousand, eight hundred thirty-six".