20750638615 has 16 divisors (see below), whose sum is σ = 28489029120. Its totient is φ = 14213504160.

The previous prime is 20750638589. The next prime is 20750638669. The reversal of 20750638615 is 51683605702.

It is not a de Polignac number, because 20750638615 - 2⁷ = 20750638487 is a prime.

It is a congruent number.

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, 290401 + ... + 354730.

It is an arithmetic number, because the mean of its divisors is an integer number (1780564320).

Almost surely, 2^20750638615 is an apocalyptic number.

20750638615 is a deficient number, since it is larger than the sum of its proper divisors (7738390505).

20750638615 is an equidigital number, since it uses as much as digits as its factorization.

20750638615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646062.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 20750638615 in words is "twenty billion, seven hundred fifty million, six hundred thirty-eight thousand, six hundred fifteen".