21696228048 has 80 divisors (see below), whose sum is σ = 61176370176. Its totient is φ = 6571125120.

The previous prime is 21696228023. The next prime is 21696228089. The reversal of 21696228048 is 84082269612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 21696227988 and 21696228006.

It is a congruent number.

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, 1089961 + ... + 1109687.

Almost surely, 2^21696228048 is an apocalyptic number.

It is an amenable number.

21696228048 is an abundant number, since it is smaller than the sum of its proper divisors (39480142128).

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

21696228048 is a wasteful number, since it uses less digits than its factorization.

21696228048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21832 (or 21826 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 21696228048 in words is "twenty-one billion, six hundred ninety-six million, two hundred twenty-eight thousand, forty-eight".