21337622040 has 128 divisors (see below), whose sum is σ = 73192066560. Its totient is φ = 4874870784.

The previous prime is 21337622039. The next prime is 21337622051. The reversal of 21337622040 is 4022673312.

It is a super-2 number, since 2×21337622040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21337621989 and 21337622007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2307907 + ... + 2317133.

It is an arithmetic number, because the mean of its divisors is an integer number (571813020).

Almost surely, 2^21337622040 is an apocalyptic number.

21337622040 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 21337622040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36596033280).

21337622040 is an abundant number, since it is smaller than the sum of its proper divisors (51854444520).

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

21337622040 is a wasteful number, since it uses less digits than its factorization.

21337622040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12001 (or 11997 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The spelling of 21337622040 in words is "twenty-one billion, three hundred thirty-seven million, six hundred twenty-two thousand, forty".