21659030371 has 12 divisors (see below), whose sum is σ = 23811722032. Its totient is φ = 19686150000.

The previous prime is 21659030317. The next prime is 21659030377. The reversal of 21659030371 is 17303095612.

It is not a de Polignac number, because 21659030371 - 2⁷ = 21659030243 is a prime.

It is a super-2 number, since 2×21659030371² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21659030371.

It is not an unprimeable number, because it can be changed into a prime (21659030377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 729721 + ... + 758821.

Almost surely, 2^21659030371 is an apocalyptic number.

21659030371 is a deficient number, since it is larger than the sum of its proper divisors (2152691661).

21659030371 is a wasteful number, since it uses less digits than its factorization.

21659030371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35274 (or 35263 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 37.

The spelling of 21659030371 in words is "twenty-one billion, six hundred fifty-nine million, thirty thousand, three hundred seventy-one".