21675790244 has 6 divisors (see below), whose sum is σ = 37932632934. Its totient is φ = 10837895120.

The previous prime is 21675790229. The next prime is 21675790259. The reversal of 21675790244 is 44209757612.

It is an interprime number because it is at equal distance from previous prime (21675790229) and next prime (21675790259).

It can be written as a sum of positive squares in only one way, i.e., 12667502500 + 9008287744 = 112550^2 + 94912^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2709473777 + ... + 2709473784.

It is an arithmetic number, because the mean of its divisors is an integer number (6322105489).

Almost surely, 2^21675790244 is an apocalyptic number.

It is an amenable number.

21675790244 is a deficient number, since it is larger than the sum of its proper divisors (16256842690).

21675790244 is a wasteful number, since it uses less digits than its factorization.

21675790244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5418947565 (or 5418947563 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 21675790244 in words is "twenty-one billion, six hundred seventy-five million, seven hundred ninety thousand, two hundred forty-four".