21476793865 has 16 divisors (see below), whose sum is σ = 25884593280. Its totient is φ = 17106603520.

The previous prime is 21476793853. The next prime is 21476793907. The reversal of 21476793865 is 56839767412.

It is not a de Polignac number, because 21476793865 - 2⁹ = 21476793353 is a prime.

It is a super-2 number, since 2×21476793865² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1437162 + ... + 1452028.

It is an arithmetic number, because the mean of its divisors is an integer number (1617787080).

Almost surely, 2^21476793865 is an apocalyptic number.

It is an amenable number.

21476793865 is a deficient number, since it is larger than the sum of its proper divisors (4407799415).

21476793865 is a wasteful number, since it uses less digits than its factorization.

21476793865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16112.

The product of its digits is 15240960, while the sum is 58.

The spelling of 21476793865 in words is "twenty-one billion, four hundred seventy-six million, seven hundred ninety-three thousand, eight hundred sixty-five".