20261976425 has 6 divisors (see below), whose sum is σ = 25124850798. Its totient is φ = 16209581120.

The previous prime is 20261976391. The next prime is 20261976451. The reversal of 20261976425 is 52467916202.

It can be written as a sum of positive squares in 3 ways, for example, as 3647797609 + 16614178816 = 60397^2 + 128896^2 .

It is not a de Polignac number, because 20261976425 - 2²⁴ = 20245199209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405239504 + ... + 405239553.

It is an arithmetic number, because the mean of its divisors is an integer number (4187475133).

Almost surely, 2^20261976425 is an apocalyptic number.

20261976425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20261976425 is a deficient number, since it is larger than the sum of its proper divisors (4862874373).

20261976425 is an equidigital number, since it uses as much as digits as its factorization.

20261976425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810479067 (or 810479062 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 20261976425 in words is "twenty billion, two hundred sixty-one million, nine hundred seventy-six thousand, four hundred twenty-five".