21390030595800 has 240 divisors, whose sum is σ = 74825218822200. Its totient is φ = 5662971532800.

The previous prime is 21390030595781. The next prime is 21390030595837. The reversal of 21390030595800 is 859503009312.

21390030595800 is a `hidden beast` number, since 2 + 1 + 39 + 0 + 0 + 30 + 5 + 9 + 580 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2497741 + ... + 7001340.

Almost surely, 2^{21390030595800} is an apocalyptic number.

21390030595800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21390030595800 is an abundant number, since it is smaller than the sum of its proper divisors (53435188226400).

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

21390030595800 is a wasteful number, since it uses less digits than its factorization.

21390030595800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499248 (or 9499230 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 21390030595800 in words is "twenty-one trillion, three hundred ninety billion, thirty million, five hundred ninety-five thousand, eight hundred".