20641166464074 has 32 divisors (see below), whose sum is σ = 44458399575744. Its totient is φ = 6351056346240.

The previous prime is 20641166464073. The next prime is 20641166464123. The reversal of 20641166464074 is 47046466114602.

It is a happy number.

It is a super-2 number, since 2×20641166464074² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20641166464073) 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, 5666814 + ... + 8567094.

It is an arithmetic number, because the mean of its divisors is an integer number (1389324986742).

Almost surely, 2^{20641166464074} is an apocalyptic number.

20641166464074 is an abundant number, since it is smaller than the sum of its proper divisors (23817233111670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20641166464074 is a wasteful number, since it uses less digits than its factorization.

20641166464074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991542.

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 20641166464074 in words is "twenty trillion, six hundred forty-one billion, one hundred sixty-six million, four hundred sixty-four thousand, seventy-four".