21662733459 has 8 divisors (see below), whose sum is σ = 28891156432. Its totient is φ = 14438066400.

The previous prime is 21662733439. The next prime is 21662733467. The reversal of 21662733459 is 95433726612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21662733459 - 2⁵ = 21662733427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21662733439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925492 + ... + 948609.

It is an arithmetic number, because the mean of its divisors is an integer number (3611394554).

Almost surely, 2^21662733459 is an apocalyptic number.

21662733459 is a deficient number, since it is larger than the sum of its proper divisors (7228422973).

21662733459 is a wasteful number, since it uses less digits than its factorization.

21662733459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877957.

The product of its digits is 1632960, while the sum is 48.

The spelling of 21662733459 in words is "twenty-one billion, six hundred sixty-two million, seven hundred thirty-three thousand, four hundred fifty-nine".