21826964826 has 48 divisors (see below), whose sum is σ = 48139128960. Its totient is φ = 7146247680.

The previous prime is 21826964791. The next prime is 21826964857. The reversal of 21826964826 is 62846962812.

21826964826 is a `hidden beast` number, since 21 + 82 + 69 + 6 + 482 + 6 = 666.

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, 234681 + ... + 314211.

It is an arithmetic number, because the mean of its divisors is an integer number (1002898520).

Almost surely, 2^21826964826 is an apocalyptic number.

21826964826 is an abundant number, since it is smaller than the sum of its proper divisors (26312164134).

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

21826964826 is a wasteful number, since it uses less digits than its factorization.

21826964826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79811 (or 79808 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 21826964826 in words is "twenty-one billion, eight hundred twenty-six million, nine hundred sixty-four thousand, eight hundred twenty-six".