20940057025 has 12 divisors (see below), whose sum is σ = 26008893484. Its totient is φ = 16724160000.

The previous prime is 20940057011. The next prime is 20940057029. The reversal of 20940057025 is 52075004902.

It can be written as a sum of positive squares in 6 ways, for example, as 233998209 + 20706058816 = 15297^2 + 143896^2 .

It is not a de Polignac number, because 20940057025 - 2⁷ = 20940056897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20940057029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681816 + ... + 711865.

Almost surely, 2^20940057025 is an apocalyptic number.

20940057025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20940057025 is a deficient number, since it is larger than the sum of its proper divisors (5068836459).

20940057025 is a wasteful number, since it uses less digits than its factorization.

20940057025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394292 (or 1394287 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 20940057025 in words is "twenty billion, nine hundred forty million, fifty-seven thousand, twenty-five".