18820092420 has 432 divisors, whose sum is σ = 66262105728. Its totient is φ = 4467778560.

The previous prime is 18820092409. The next prime is 18820092433. The reversal of 18820092420 is 2429002881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 29825505 + ... + 29826135.

It is an arithmetic number, because the mean of its divisors is an integer number (153384504).

Almost surely, 2^18820092420 is an apocalyptic number.

18820092420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18820092420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33131052864).

18820092420 is an abundant number, since it is smaller than the sum of its proper divisors (47442013308).

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

18820092420 is a wasteful number, since it uses less digits than its factorization.

18820092420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 18820092420 in words is "eighteen billion, eight hundred twenty million, ninety-two thousand, four hundred twenty".