21632233716257 has 24 divisors (see below), whose sum is σ = 22391970084288. Its totient is φ = 20897532070560.

The previous prime is 21632233716187. The next prime is 21632233716283. The reversal of 21632233716257 is 75261733223612.

It is not a de Polignac number, because 21632233716257 - 2¹⁸ = 21632233454113 is a prime.

It is a super-2 number, since 2×21632233716257² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21632233716287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2484460298 + ... + 2484469004.

It is an arithmetic number, because the mean of its divisors is an integer number (932998753512).

Almost surely, 2^{21632233716257} is an apocalyptic number.

It is an amenable number.

21632233716257 is a deficient number, since it is larger than the sum of its proper divisors (759736368031).

21632233716257 is an equidigital number, since it uses as much as digits as its factorization.

21632233716257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13029 (or 12998 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 50.

Adding to 21632233716257 its reverse (75261733223612), we get a palindrome (96893966939869).

The spelling of 21632233716257 in words is "twenty-one trillion, six hundred thirty-two billion, two hundred thirty-three million, seven hundred sixteen thousand, two hundred fifty-seven".