21228685995 has 96 divisors (see below), whose sum is σ = 40637376000. Its totient is φ = 9352161280.

The previous prime is 21228685963. The next prime is 21228686021. The reversal of 21228685995 is 59958682212.

It is not a de Polignac number, because 21228685995 - 2⁵ = 21228685963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2354506 + ... + 2363504.

It is an arithmetic number, because the mean of its divisors is an integer number (423306000).

Almost surely, 2^21228685995 is an apocalyptic number.

21228685995 is a deficient number, since it is larger than the sum of its proper divisors (19408690005).

21228685995 is a wasteful number, since it uses less digits than its factorization.

21228685995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093 (or 9064 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 57.

The spelling of 21228685995 in words is "twenty-one billion, two hundred twenty-eight million, six hundred eighty-five thousand, nine hundred ninety-five".