20126261746625 has 8 divisors (see below), whose sum is σ = 25117574659944. Its totient is φ = 16101009397200.

The previous prime is 20126261746541. The next prime is 20126261746667. The reversal of 20126261746625 is 52664716262102.

It can be written as a sum of positive squares in 4 ways, for example, as 4198372314049 + 15927889432576 = 2048993^2 + 3990976^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20126261746625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80505046862 + ... + 80505047111.

It is an arithmetic number, because the mean of its divisors is an integer number (3139696832493).

Almost surely, 2^{20126261746625} is an apocalyptic number.

20126261746625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20126261746625 is a deficient number, since it is larger than the sum of its proper divisors (4991312913319).

20126261746625 is an equidigital number, since it uses as much as digits as its factorization.

20126261746625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161010093988 (or 161010093978 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 20126261746625 in words is "twenty trillion, one hundred twenty-six billion, two hundred sixty-one million, seven hundred forty-six thousand, six hundred twenty-five".