20554107605 has 4 divisors (see below), whose sum is σ = 24664929132. Its totient is φ = 16443286080.

The previous prime is 20554107551. The next prime is 20554107617. The reversal of 20554107605 is 50670145502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12449426929 + 8104680676 = 111577^2 + 90026^2 .

It is not a de Polignac number, because 20554107605 - 2¹⁴ = 20554091221 is a prime.

It is a Duffinian number.

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, 2055410756 + ... + 2055410765.

It is an arithmetic number, because the mean of its divisors is an integer number (6166232283).

Almost surely, 2^20554107605 is an apocalyptic number.

It is an amenable number.

20554107605 is a deficient number, since it is larger than the sum of its proper divisors (4110821527).

20554107605 is an equidigital number, since it uses as much as digits as its factorization.

20554107605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110821526.

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 20554107605 in words is "twenty billion, five hundred fifty-four million, one hundred seven thousand, six hundred five".