20135640614125 has 16 divisors (see below), whose sum is σ = 25129856791728. Its totient is φ = 16108142424000.

The previous prime is 20135640614107. The next prime is 20135640614153. The reversal of 20135640614125 is 52141604653102.

It can be written as a sum of positive squares in 8 ways, for example, as 3304404111204 + 16831236502921 = 1817802^2 + 4102589^2 .

It is not a de Polignac number, because 20135640614125 - 2²⁹ = 20135103743213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3678315 + ... + 7334935.

It is an arithmetic number, because the mean of its divisors is an integer number (1570616049483).

Almost surely, 2^{20135640614125} is an apocalyptic number.

20135640614125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20135640614125 is a deficient number, since it is larger than the sum of its proper divisors (4994216177603).

20135640614125 is an equidigital number, since it uses as much as digits as its factorization.

20135640614125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700689 (or 3700679 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 20135640614125 in words is "twenty trillion, one hundred thirty-five billion, six hundred forty million, six hundred fourteen thousand, one hundred twenty-five".