20645755754601 has 32 divisors (see below), whose sum is σ = 28305071308800. Its totient is φ = 13376023577280.

The previous prime is 20645755754599. The next prime is 20645755754609. The reversal of 20645755754601 is 10645755754602.

It is not a de Polignac number, because 20645755754601 - 2¹ = 20645755754599 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20645755754609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608804836 + ... + 608838746.

It is an arithmetic number, because the mean of its divisors is an integer number (884533478400).

Almost surely, 2^{20645755754601} is an apocalyptic number.

It is an amenable number.

20645755754601 is a deficient number, since it is larger than the sum of its proper divisors (7659315554199).

20645755754601 is a wasteful number, since it uses less digits than its factorization.

20645755754601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40269.

The product of its (nonzero) digits is 35280000, while the sum is 57.

Subtracting from 20645755754601 its reverse (10645755754602), we obtain a palindrome (9999999999999).

The spelling of 20645755754601 in words is "twenty trillion, six hundred forty-five billion, seven hundred fifty-five million, seven hundred fifty-four thousand, six hundred one".