21696228050 has 48 divisors (see below), whose sum is σ = 46133505600. Its totient is φ = 7436525760.

The previous prime is 21696228023. The next prime is 21696228089. The reversal of 21696228050 is 5082269612.

It is a junction number, because it is equal to n+sod(n) for n = 21696227989 and 21696228007.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1585337 + ... + 1598963.

It is an arithmetic number, because the mean of its divisors is an integer number (961114700).

Almost surely, 2^21696228050 is an apocalyptic number.

21696228050 is an abundant number, since it is smaller than the sum of its proper divisors (24437277550).

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

21696228050 is a wasteful number, since it uses less digits than its factorization.

21696228050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18195 (or 18190 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 21696228050 in words is "twenty-one billion, six hundred ninety-six million, two hundred twenty-eight thousand, fifty".