21476362128 has 40 divisors (see below), whose sum is σ = 59748342528. Its totient is φ = 6608111232.

The previous prime is 21476362121. The next prime is 21476362181. The reversal of 21476362128 is 82126367412.

It is a super-2 number, since 2×21476362128² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21476362128.

It is not an unprimeable number, because it can be changed into a prime (21476362121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17208000 + ... + 17209247.

Almost surely, 2^21476362128 is an apocalyptic number.

It is an amenable number.

21476362128 is an abundant number, since it is smaller than the sum of its proper divisors (38271980400).

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

21476362128 is a wasteful number, since it uses less digits than its factorization.

21476362128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34417271 (or 34417265 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The spelling of 21476362128 in words is "twenty-one billion, four hundred seventy-six million, three hundred sixty-two thousand, one hundred twenty-eight".