20106564425 has 12 divisors (see below), whose sum is σ = 25011805020. Its totient is φ = 16033854720.

The previous prime is 20106564409. The next prime is 20106564433. The reversal of 20106564425 is 52446560102.

It can be written as a sum of positive squares in 6 ways, for example, as 3330097849 + 16776466576 = 57707^2 + 129524^2 .

It is not a de Polignac number, because 20106564425 - 2⁴ = 20106564409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1276940 + ... + 1292589.

It is an arithmetic number, because the mean of its divisors is an integer number (2084317085).

Almost surely, 2^20106564425 is an apocalyptic number.

20106564425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20106564425 is a deficient number, since it is larger than the sum of its proper divisors (4905240595).

20106564425 is a wasteful number, since it uses less digits than its factorization.

20106564425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569852 (or 2569847 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 20106564425 in words is "twenty billion, one hundred six million, five hundred sixty-four thousand, four hundred twenty-five".