21204682322040 has 128 divisors (see below), whose sum is σ = 80779742208000. Its totient is φ = 4846784529024.

The previous prime is 21204682322009. The next prime is 21204682322113. The reversal of 21204682322040 is 4022328640212.

21204682322040 is a `hidden beast` number, since 2 + 120 + 468 + 2 + 32 + 2 + 0 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21204682321986 and 21204682322004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1402418520 + ... + 1402433639.

It is an arithmetic number, because the mean of its divisors is an integer number (631091736000).

Almost surely, 2^{21204682322040} is an apocalyptic number.

21204682322040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21204682322040 is an abundant number, since it is smaller than the sum of its proper divisors (59575059885960).

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

21204682322040 is a wasteful number, since it uses less digits than its factorization.

21204682322040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804852186 (or 2804852176 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The spelling of 21204682322040 in words is "twenty-one trillion, two hundred four billion, six hundred eighty-two million, three hundred twenty-two thousand, forty".