21385004078088 has 48 divisors (see below), whose sum is σ = 66191679290880. Its totient is φ = 6110001165024.

The previous prime is 21385004078059. The next prime is 21385004078093. The reversal of 21385004078088 is 88087040058312.

21385004078088 is a `hidden beast` number, since 2 + 1 + 3 + 85 + 0 + 0 + 407 + 80 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21215281320 + ... + 21215282327.

It is an arithmetic number, because the mean of its divisors is an integer number (1378993318560).

Almost surely, 2^{21385004078088} is an apocalyptic number.

21385004078088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21385004078088 is an abundant number, since it is smaller than the sum of its proper divisors (44806675212792).

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

21385004078088 is a wasteful number, since it uses less digits than its factorization.

21385004078088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42430563666 (or 42430563659 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The spelling of 21385004078088 in words is "twenty-one trillion, three hundred eighty-five billion, four million, seventy-eight thousand, eighty-eight".