21336881040 has 240 divisors, whose sum is σ = 74908634112. Its totient is φ = 5432503296.

The previous prime is 21336880991. The next prime is 21336881089. The reversal of 21336881040 is 4018863312.

21336881040 is a `hidden beast` number, since 213 + 368 + 81 + 0 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21336880991) and next prime (21336881089).

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×21336881040² (a number of 21 digits) contains 22 as substring.

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 = 21336880986 and 21336881004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14290534 + ... + 14292026.

Almost surely, 2^21336881040 is an apocalyptic number.

21336881040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21336881040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37454317056).

21336881040 is an abundant number, since it is smaller than the sum of its proper divisors (53571753072).

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

21336881040 is a wasteful number, since it uses less digits than its factorization.

21336881040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 21336881040 in words is "twenty-one billion, three hundred thirty-six million, eight hundred eighty-one thousand, forty".