18922420502540 has 24 divisors (see below), whose sum is σ = 39864038605440. Its totient is φ = 7544786191488.

The previous prime is 18922420502533. The next prime is 18922420502549. The reversal of 18922420502540 is 4520502422981.

It is a super-2 number, since 2×18922420502540² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18922420502491 and 18922420502500.

It is not an unprimeable number, because it can be changed into a prime (18922420502549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511369180 + ... + 1511381699.

It is an arithmetic number, because the mean of its divisors is an integer number (1661001608560).

Almost surely, 2^{18922420502540} is an apocalyptic number.

18922420502540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18922420502540 is an abundant number, since it is smaller than the sum of its proper divisors (20941618102900).

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

18922420502540 is a wasteful number, since it uses less digits than its factorization.

18922420502540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022751201 (or 3022751199 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 18922420502540 in words is "eighteen trillion, nine hundred twenty-two billion, four hundred twenty million, five hundred two thousand, five hundred forty".