102305011820 has 24 divisors (see below), whose sum is σ = 234371482128. Its totient is φ = 37201822400.

The previous prime is 102305011777. The next prime is 102305011843. The reversal of 102305011820 is 28110503201.

It is a happy number.

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, 232511171 + ... + 232511610.

It is an arithmetic number, because the mean of its divisors is an integer number (9765478422).

Almost surely, 2^102305011820 is an apocalyptic number.

102305011820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102305011820 is an abundant number, since it is smaller than the sum of its proper divisors (132066470308).

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

102305011820 is a wasteful number, since it uses less digits than its factorization.

102305011820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465022801 (or 465022799 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 102305011820 in words is "one hundred two billion, three hundred five million, eleven thousand, eight hundred twenty".