183820021820 has 48 divisors (see below), whose sum is σ = 409266895968. Its totient is φ = 69111797760.

The previous prime is 183820021807. The next prime is 183820021823. The reversal of 183820021820 is 28120028381.

It is a super-2 number, since 2×183820021820² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (183820021823) 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, 96482 + ... + 613961.

It is an arithmetic number, because the mean of its divisors is an integer number (8526393666).

Almost surely, 2^183820021820 is an apocalyptic number.

183820021820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

183820021820 is an abundant number, since it is smaller than the sum of its proper divisors (225446874148).

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

183820021820 is a wasteful number, since it uses less digits than its factorization.

183820021820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711230 (or 711228 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The spelling of 183820021820 in words is "one hundred eighty-three billion, eight hundred twenty million, twenty-one thousand, eight hundred twenty".