20554672139 has 2 divisors, whose sum is σ = 20554672140. Its totient is φ = 20554672138.

The previous prime is 20554672097. The next prime is 20554672163. The reversal of 20554672139 is 93127645502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20554672139 - 2⁸ = 20554671883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20554672139.

It is not a weakly prime, because it can be changed into another prime (20554672339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277336069 + 10277336070.

It is an arithmetic number, because the mean of its divisors is an integer number (10277336070).

Almost surely, 2^20554672139 is an apocalyptic number.

20554672139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554672139 is an equidigital number, since it uses as much as digits as its factorization.

20554672139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 20554672139 in words is "twenty billion, five hundred fifty-four million, six hundred seventy-two thousand, one hundred thirty-nine".