21590063869 has 64 divisors (see below), whose sum is σ = 27282873600. Its totient is φ = 16818278400.

The previous prime is 21590063857. The next prime is 21590063893. The reversal of 21590063869 is 96836009512.

It is not a de Polignac number, because 21590063869 - 2⁵ = 21590063837 is a prime.

It is a super-2 number, since 2×21590063869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21590063899) 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, 32662399 + ... + 32663059.

It is an arithmetic number, because the mean of its divisors is an integer number (426294900).

Almost surely, 2^21590063869 is an apocalyptic number.

21590063869 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

21590063869 is a deficient number, since it is larger than the sum of its proper divisors (5692809731).

21590063869 is a wasteful number, since it uses less digits than its factorization.

21590063869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 21590063869 in words is "twenty-one billion, five hundred ninety million, sixty-three thousand, eight hundred sixty-nine".