20306444877188 has 12 divisors (see below), whose sum is σ = 35541059466780. Its totient is φ = 10151856458112.

The previous prime is 20306444877163. The next prime is 20306444877287. The reversal of 20306444877188 is 88177844460302.

It can be written as a sum of positive squares in 2 ways, for example, as 8287132472644 + 12019312404544 = 2878738^2 + 3466888^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20306444877188.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341461673 + ... + 341521136.

It is an arithmetic number, because the mean of its divisors is an integer number (2961754955565).

Almost surely, 2^{20306444877188} is an apocalyptic number.

It is an amenable number.

20306444877188 is a deficient number, since it is larger than the sum of its proper divisors (15234614589592).

20306444877188 is a wasteful number, since it uses less digits than its factorization.

20306444877188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682990246 (or 682990244 counting only the distinct ones).

The product of its (nonzero) digits is 57802752, while the sum is 62.

The spelling of 20306444877188 in words is "twenty trillion, three hundred six billion, four hundred forty-four million, eight hundred seventy-seven thousand, one hundred eighty-eight".