21690623040 has 112 divisors (see below), whose sum is σ = 68898211200. Its totient is φ = 5781606400.

The previous prime is 21690623039. The next prime is 21690623063. The reversal of 21690623040 is 4032609612.

It is a junction number, because it is equal to n+sod(n) for n = 21690622992 and 21690623010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3307765 + ... + 3314315.

It is an arithmetic number, because the mean of its divisors is an integer number (615162600).

Almost surely, 2^21690623040 is an apocalyptic number.

21690623040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21690623040 is an abundant number, since it is smaller than the sum of its proper divisors (47207588160).

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

21690623040 is a wasteful number, since it uses less digits than its factorization.

21690623040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10020 (or 10010 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 21690623040 in words is "twenty-one billion, six hundred ninety million, six hundred twenty-three thousand, forty".