21224483665 has 32 divisors (see below), whose sum is σ = 31767240960. Its totient is φ = 13225344000.

The previous prime is 21224483647. The next prime is 21224483671. The reversal of 21224483665 is 56638442212.

It is not a de Polignac number, because 21224483665 - 2¹³ = 21224475473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1040565 + ... + 1060765.

It is an arithmetic number, because the mean of its divisors is an integer number (992726280).

Almost surely, 2^21224483665 is an apocalyptic number.

It is an amenable number.

21224483665 is a deficient number, since it is larger than the sum of its proper divisors (10542757295).

21224483665 is a wasteful number, since it uses less digits than its factorization.

21224483665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22953.

The product of its digits is 552960, while the sum is 43.

The spelling of 21224483665 in words is "twenty-one billion, two hundred twenty-four million, four hundred eighty-three thousand, six hundred sixty-five".