21922617087 has 64 divisors (see below), whose sum is σ = 39343472640. Its totient is φ = 11777591808.

The previous prime is 21922617071. The next prime is 21922617113. The reversal of 21922617087 is 78071622912.

It is a happy number.

21922617087 is a `hidden beast` number, since 2 + 1 + 9 + 22 + 617 + 0 + 8 + 7 = 666.

It is not a de Polignac number, because 21922617087 - 2⁴ = 21922617071 is a prime.

It is a super-2 number, since 2×21922617087² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21922613087) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3489393 + ... + 3495669.

It is an arithmetic number, because the mean of its divisors is an integer number (614741760).

Almost surely, 2^21922617087 is an apocalyptic number.

21922617087 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21922617087 is a deficient number, since it is larger than the sum of its proper divisors (17420855553).

21922617087 is a wasteful number, since it uses less digits than its factorization.

21922617087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7397 (or 7391 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 21922617087 in words is "twenty-one billion, nine hundred twenty-two million, six hundred seventeen thousand, eighty-seven".