20007515806 has 16 divisors (see below), whose sum is σ = 30284669088. Its totient is φ = 9912672000.

The previous prime is 20007515719. The next prime is 20007515837. The reversal of 20007515806 is 60851570002.

It is a congruent number.

It is an unprimeable number.

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, 1109986 + ... + 1127866.

It is an arithmetic number, because the mean of its divisors is an integer number (1892791818).

Almost surely, 2^20007515806 is an apocalyptic number.

20007515806 is a deficient number, since it is larger than the sum of its proper divisors (10277153282).

20007515806 is a wasteful number, since it uses less digits than its factorization.

20007515806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22947.

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 20007515806 in words is "twenty billion, seven million, five hundred fifteen thousand, eight hundred six".