21504402383139 has 96 divisors (see below), whose sum is σ = 36177526554624. Its totient is φ = 12188381506560.

The previous prime is 21504402383131. The next prime is 21504402383179. The reversal of 21504402383139 is 93138320440512.

It is a happy number.

21504402383139 is a `hidden beast` number, since 2 + 1 + 50 + 440 + 23 + 8 + 3 + 139 = 666.

It is not a de Polignac number, because 21504402383139 - 2³ = 21504402383131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21504402383094 and 21504402383103.

It is not an unprimeable number, because it can be changed into a prime (21504402383131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1108979134 + ... + 1108998524.

It is an arithmetic number, because the mean of its divisors is an integer number (376849234944).

Almost surely, 2^{21504402383139} is an apocalyptic number.

21504402383139 is a deficient number, since it is larger than the sum of its proper divisors (14673124171485).

21504402383139 is a wasteful number, since it uses less digits than its factorization.

21504402383139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31337 (or 31334 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 21504402383139 in words is "twenty-one trillion, five hundred four billion, four hundred two million, three hundred eighty-three thousand, one hundred thirty-nine".