18745938855 has 192 divisors, whose sum is σ = 39349739520. Its totient is φ = 8076672000.

The previous prime is 18745938847. The next prime is 18745938857. The reversal of 18745938855 is 55883954781.

It is not a de Polignac number, because 18745938855 - 2³ = 18745938847 is a prime.

It is a super-2 number, since 2×18745938855² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 18745938792 and 18745938801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18745938857) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 81859881 + ... + 81860109.

It is an arithmetic number, because the mean of its divisors is an integer number (204946560).

Almost surely, 2^18745938855 is an apocalyptic number.

18745938855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18745938855 is an abundant number, since it is smaller than the sum of its proper divisors (20603800665).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18745938855 is a wasteful number, since it uses less digits than its factorization.

18745938855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 459 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 63.

The spelling of 18745938855 in words is "eighteen billion, seven hundred forty-five million, nine hundred thirty-eight thousand, eight hundred fifty-five".