20004421135744 has 32 divisors (see below), whose sum is σ = 39853140303600. Its totient is φ = 10002064353792.

The previous prime is 20004421135723. The next prime is 20004421135837. The reversal of 20004421135744 is 44753112440002.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7928389 + ... + 10142395.

Almost surely, 2^{20004421135744} is an apocalyptic number.

It is an amenable number.

20004421135744 is a deficient number, since it is larger than the sum of its proper divisors (19848719167856).

20004421135744 is an equidigital number, since it uses as much as digits as its factorization.

20004421135744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284610 (or 2284598 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 37.

Adding to 20004421135744 its reverse (44753112440002), we get a palindrome (64757533575746).

The spelling of 20004421135744 in words is "twenty trillion, four billion, four hundred twenty-one million, one hundred thirty-five thousand, seven hundred forty-four".