21670627596 has 24 divisors (see below), whose sum is σ = 50677426800. Its totient is φ = 7207452672.

The previous prime is 21670627591. The next prime is 21670627603. The reversal of 21670627596 is 69572607612.

It is a super-2 number, since 2×21670627596² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21670627591) 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, 2005621 + ... + 2016396.

It is an arithmetic number, because the mean of its divisors is an integer number (2111559450).

Almost surely, 2^21670627596 is an apocalyptic number.

It is an amenable number.

21670627596 is an abundant number, since it is smaller than the sum of its proper divisors (29006799204).

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

21670627596 is a wasteful number, since it uses less digits than its factorization.

21670627596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022473 (or 4022471 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 21670627596 in words is "twenty-one billion, six hundred seventy million, six hundred twenty-seven thousand, five hundred ninety-six".