20641735454 has 48 divisors (see below), whose sum is σ = 33079132800. Its totient is φ = 9649860480.

The previous prime is 20641735441. The next prime is 20641735463. The reversal of 20641735454 is 45453714602.

It is a super-2 number, since 2×20641735454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13325072 + ... + 13326620.

It is an arithmetic number, because the mean of its divisors is an integer number (689148600).

Almost surely, 2^20641735454 is an apocalyptic number.

20641735454 is a deficient number, since it is larger than the sum of its proper divisors (12437397346).

20641735454 is a wasteful number, since it uses less digits than its factorization.

20641735454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 20641735454 in words is "twenty billion, six hundred forty-one million, seven hundred thirty-five thousand, four hundred fifty-four".