20404052012611 has 6 divisors (see below), whose sum is σ = 21674892622700. Its totient is φ = 19203813658656.

The previous prime is 20404052012587. The next prime is 20404052012621. The reversal of 20404052012611 is 11621025040402.

It is not a de Polignac number, because 20404052012611 - 2⁵ = 20404052012579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20404052012611.

It is not an unprimeable number, because it can be changed into a prime (20404052012621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35301127761 + ... + 35301128338.

Almost surely, 2^{20404052012611} is an apocalyptic number.

20404052012611 is a deficient number, since it is larger than the sum of its proper divisors (1270840610089).

20404052012611 is an equidigital number, since it uses as much as digits as its factorization.

20404052012611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70602256133 (or 70602256116 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 20404052012611 in words is "twenty trillion, four hundred four billion, fifty-two million, twelve thousand, six hundred eleven".