20106564404 has 6 divisors (see below), whose sum is σ = 35186487714. Its totient is φ = 10053282200.

The previous prime is 20106564391. The next prime is 20106564409. The reversal of 20106564404 is 40446560102.

It can be written as a sum of positive squares in only one way, i.e., 20035836304 + 70728100 = 141548^2 + 8410^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106564409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513320547 + ... + 2513320554.

It is an arithmetic number, because the mean of its divisors is an integer number (5864414619).

Almost surely, 2^20106564404 is an apocalyptic number.

It is an amenable number.

20106564404 is a deficient number, since it is larger than the sum of its proper divisors (15079923310).

20106564404 is a wasteful number, since it uses less digits than its factorization.

20106564404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026641105 (or 5026641103 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 20106564404 in words is "twenty billion, one hundred six million, five hundred sixty-four thousand, four hundred four".