18977072001831 has 24 divisors (see below), whose sum is σ = 27759406109760. Its totient is φ = 12490741785600.

The previous prime is 18977072001829. The next prime is 18977072001911. The reversal of 18977072001831 is 13810027077981.

It is not a de Polignac number, because 18977072001831 - 2¹ = 18977072001829 is a prime.

It is a super-2 number, since 2×18977072001831² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18977072008831) 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, 17856511 + ... + 18889391.

It is an arithmetic number, because the mean of its divisors is an integer number (1156641921240).

Almost surely, 2^{18977072001831} is an apocalyptic number.

18977072001831 is a deficient number, since it is larger than the sum of its proper divisors (8782334107929).

18977072001831 is a wasteful number, since it uses less digits than its factorization.

18977072001831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058807 (or 1058804 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 54.

The spelling of 18977072001831 in words is "eighteen trillion, nine hundred seventy-seven billion, seventy-two million, one thousand, eight hundred thirty-one".