20554672123 has 16 divisors (see below), whose sum is σ = 21527997120. Its totient is φ = 19606634496.

The previous prime is 20554672097. The next prime is 20554672139. The reversal of 20554672123 is 32127645502.

It is a cyclic number.

It is not a de Polignac number, because 20554672123 - 2⁵ = 20554672091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (20554672163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428283 + ... + 473851.

It is an arithmetic number, because the mean of its divisors is an integer number (1345499820).

Almost surely, 2^20554672123 is an apocalyptic number.

20554672123 is a deficient number, since it is larger than the sum of its proper divisors (973324997).

20554672123 is a wasteful number, since it uses less digits than its factorization.

20554672123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45846.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 20554672123 in words is "twenty billion, five hundred fifty-four million, six hundred seventy-two thousand, one hundred twenty-three".