21796352577 has 24 divisors (see below), whose sum is σ = 31732632360. Its totient is φ = 14416427520.

The previous prime is 21796352549. The next prime is 21796352593. The reversal of 21796352577 is 77525369712.

21796352577 is a `hidden beast` number, since 2 + 1 + 7 + 9 + 63 + 5 + 2 + 577 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 295702416 + 21500650161 = 17196^2 + 146631^2 .

It is not a de Polignac number, because 21796352577 - 2⁸ = 21796352321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21796352597) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564783 + ... + 602139.

It is an arithmetic number, because the mean of its divisors is an integer number (1322193015).

Almost surely, 2^21796352577 is an apocalyptic number.

It is an amenable number.

21796352577 is a deficient number, since it is larger than the sum of its proper divisors (9936279783).

21796352577 is a wasteful number, since it uses less digits than its factorization.

21796352577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37873 (or 37870 counting only the distinct ones).

The product of its digits is 5556600, while the sum is 54.

The spelling of 21796352577 in words is "twenty-one billion, seven hundred ninety-six million, three hundred fifty-two thousand, five hundred seventy-seven".