21622023505640 has 16 divisors (see below), whose sum is σ = 48649552887780. Its totient is φ = 8648809402240.

The previous prime is 21622023505633. The next prime is 21622023505669. The reversal of 21622023505640 is 4650532022612.

It can be written as a sum of positive squares in 2 ways, for example, as 18562189924996 + 3059833580644 = 4308386^2 + 1749238^2 .

It is a super-2 number, since 2×21622023505640² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21622023505594 and 21622023505603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270275293781 + ... + 270275293860.

Almost surely, 2^{21622023505640} is an apocalyptic number.

21622023505640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21622023505640 is an abundant number, since it is smaller than the sum of its proper divisors (27027529382140).

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

21622023505640 is a wasteful number, since it uses less digits than its factorization.

21622023505640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540550587652 (or 540550587648 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 21622023505640 in words is "twenty-one trillion, six hundred twenty-two billion, twenty-three million, five hundred five thousand, six hundred forty".