18397901941 has 16 divisors (see below), whose sum is σ = 18994187520. Its totient is φ = 17807100480.

The previous prime is 18397901939. The next prime is 18397901971. The reversal of 18397901941 is 14910979381.

It is a cyclic number.

It is not a de Polignac number, because 18397901941 - 2¹ = 18397901939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397901971) 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, 6258450 + ... + 6261388.

It is an arithmetic number, because the mean of its divisors is an integer number (1187136720).

Almost surely, 2^18397901941 is an apocalyptic number.

It is an amenable number.

18397901941 is a deficient number, since it is larger than the sum of its proper divisors (596285579).

18397901941 is a wasteful number, since it uses less digits than its factorization.

18397901941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804.

The product of its (nonzero) digits is 489888, while the sum is 52.

The spelling of 18397901941 in words is "eighteen billion, three hundred ninety-seven million, nine hundred one thousand, nine hundred forty-one".