20013725145426 has 64 divisors (see below), whose sum is σ = 40195301068800. Its totient is φ = 6643335378816.

The previous prime is 20013725145367. The next prime is 20013725145443. The reversal of 20013725145426 is 62454152731002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4382245395 + ... + 4382249961.

It is an arithmetic number, because the mean of its divisors is an integer number (628051579200).

Almost surely, 2^{20013725145426} is an apocalyptic number.

20013725145426 is an abundant number, since it is smaller than the sum of its proper divisors (20181575923374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20013725145426 is a wasteful number, since it uses less digits than its factorization.

20013725145426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7703.

The product of its (nonzero) digits is 403200, while the sum is 42.

Adding to 20013725145426 its reverse (62454152731002), we get a palindrome (82467877876428).

The spelling of 20013725145426 in words is "twenty trillion, thirteen billion, seven hundred twenty-five million, one hundred forty-five thousand, four hundred twenty-six".