21999617296 has 10 divisors (see below), whose sum is σ = 42624258542. Its totient is φ = 10999808640.

The previous prime is 21999617273. The next prime is 21999617303. The reversal of 21999617296 is 69271699912.

It can be written as a sum of positive squares in only one way, i.e., 11591536896 + 10408080400 = 107664^2 + 102020^2 .

It is a super-2 number, since 2×21999617296² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687488025 + ... + 687488056.

Almost surely, 2^21999617296 is an apocalyptic number.

It is an amenable number.

21999617296 is a deficient number, since it is larger than the sum of its proper divisors (20624641246).

21999617296 is a wasteful number, since it uses less digits than its factorization.

21999617296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374976089 (or 1374976083 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 61.

The spelling of 21999617296 in words is "twenty-one billion, nine hundred ninety-nine million, six hundred seventeen thousand, two hundred ninety-six".