18545202020 has 24 divisors (see below), whose sum is σ = 39526194624. Its totient is φ = 7307362656.

The previous prime is 18545201977. The next prime is 18545202061. The reversal of 18545202020 is 2020254581.

It is a super-2 number, since 2×18545202020² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6918512 + ... + 6921191.

It is an arithmetic number, because the mean of its divisors is an integer number (1646924776).

Almost surely, 2^18545202020 is an apocalyptic number.

18545202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18545202020 is an abundant number, since it is smaller than the sum of its proper divisors (20980992604).

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

18545202020 is a wasteful number, since it uses less digits than its factorization.

18545202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13839779 (or 13839777 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The spelling of 18545202020 in words is "eighteen billion, five hundred forty-five million, two hundred two thousand, twenty".