20125536413672 has 16 divisors (see below), whose sum is σ = 37735430784900. Its totient is φ = 10062754871040.

The previous prime is 20125536413663. The next prime is 20125536413681. The reversal of 20125536413672 is 27631463552102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20125536413663) and next prime (20125536413681).

It can be written as a sum of positive squares in 2 ways, for example, as 20045552655076 + 79983758596 = 4477226^2 + 282814^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8142272 + ... + 10322192.

Almost surely, 2^{20125536413672} is an apocalyptic number.

It is an amenable number.

20125536413672 is a deficient number, since it is larger than the sum of its proper divisors (17609894371228).

20125536413672 is a wasteful number, since it uses less digits than its factorization.

20125536413672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333956 (or 3333952 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

Adding to 20125536413672 its reverse (27631463552102), we get a palindrome (47756999965774).

The spelling of 20125536413672 in words is "twenty trillion, one hundred twenty-five billion, five hundred thirty-six million, four hundred thirteen thousand, six hundred seventy-two".