18202203820 has 12 divisors (see below), whose sum is σ = 38224628064. Its totient is φ = 7280881520.

The previous prime is 18202203791. The next prime is 18202203847. The reversal of 18202203820 is 2830220281.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455055076 + ... + 455055115.

It is an arithmetic number, because the mean of its divisors is an integer number (3185385672).

Almost surely, 2^18202203820 is an apocalyptic number.

18202203820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18202203820 is an abundant number, since it is smaller than the sum of its proper divisors (20022424244).

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

18202203820 is a wasteful number, since it uses less digits than its factorization.

18202203820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910110200 (or 910110198 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 18202203820 in words is "eighteen billion, two hundred two million, two hundred three thousand, eight hundred twenty".