21632667585 has 16 divisors (see below), whose sum is σ = 34617732480. Its totient is φ = 11535601280.

The previous prime is 21632667559. The next prime is 21632667587. The reversal of 21632667585 is 58576623612.

It is not a de Polignac number, because 21632667585 - 2²¹ = 21630570433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21632667587) 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, 12765 + ... + 208394.

It is an arithmetic number, because the mean of its divisors is an integer number (2163608280).

Almost surely, 2^21632667585 is an apocalyptic number.

It is an amenable number.

21632667585 is a deficient number, since it is larger than the sum of its proper divisors (12985064895).

21632667585 is a wasteful number, since it uses less digits than its factorization.

21632667585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227688.

The product of its digits is 3628800, while the sum is 51.

The spelling of 21632667585 in words is "twenty-one billion, six hundred thirty-two million, six hundred sixty-seven thousand, five hundred eighty-five".