21799377633 has 16 divisors (see below), whose sum is σ = 32801572800. Its totient is φ = 12756166080.

The previous prime is 21799377601. The next prime is 21799377647. The reversal of 21799377633 is 33677399712.

It is not a de Polignac number, because 21799377633 - 2⁵ = 21799377601 is a prime.

It is a super-2 number, since 2×21799377633² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21799377433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11388478 + ... + 11390391.

It is an arithmetic number, because the mean of its divisors is an integer number (2050098300).

Almost surely, 2^21799377633 is an apocalyptic number.

It is an amenable number.

21799377633 is a deficient number, since it is larger than the sum of its proper divisors (11002195167).

21799377633 is a wasteful number, since it uses less digits than its factorization.

21799377633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22778912.

The product of its digits is 9001692, while the sum is 57.

The spelling of 21799377633 in words is "twenty-one billion, seven hundred ninety-nine million, three hundred seventy-seven thousand, six hundred thirty-three".