21996104049 has 12 divisors (see below), whose sum is σ = 31792550400. Its totient is φ = 14654653944.

The previous prime is 21996103999. The next prime is 21996104051. The reversal of 21996104049 is 94040169912.

21996104049 is a `hidden beast` number, since 21 + 9 + 9 + 610 + 4 + 0 + 4 + 9 = 666.

It is not a de Polignac number, because 21996104049 - 2¹² = 21996099953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21996103995 and 21996104013.

It is not an unprimeable number, because it can be changed into a prime (21996104069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 769809 + ... + 797870.

It is an arithmetic number, because the mean of its divisors is an integer number (2649379200).

Almost surely, 2^21996104049 is an apocalyptic number.

It is an amenable number.

21996104049 is a deficient number, since it is larger than the sum of its proper divisors (9796446351).

21996104049 is a wasteful number, since it uses less digits than its factorization.

21996104049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569244 (or 1569241 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 21996104049 in words is "twenty-one billion, nine hundred ninety-six million, one hundred four thousand, forty-nine".