20177672823 has 24 divisors (see below), whose sum is σ = 36337282176. Its totient is φ = 10481907600.

The previous prime is 20177672743. The next prime is 20177672869. The reversal of 20177672823 is 32827677102.

It is not a de Polignac number, because 20177672823 - 2⁹ = 20177672311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20177672873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14557513 + ... + 14558898.

It is an arithmetic number, because the mean of its divisors is an integer number (1514053424).

Almost surely, 2^20177672823 is an apocalyptic number.

20177672823 is a deficient number, since it is larger than the sum of its proper divisors (16159609353).

20177672823 is a wasteful number, since it uses less digits than its factorization.

20177672823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29116435 (or 29116432 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 20177672823 in words is "twenty billion, one hundred seventy-seven million, six hundred seventy-two thousand, eight hundred twenty-three".