20013123701747 has 16 divisors (see below), whose sum is σ = 23143863933792. Its totient is φ = 17103453688320.

The previous prime is 20013123701693. The next prime is 20013123701803. The reversal of 20013123701747 is 74710732131002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20013123701747 - 2⁸ = 20013123701491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20013123701747.

It is not an unprimeable number, because it can be changed into a prime (20013123703747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62573228 + ... + 62892249.

It is an arithmetic number, because the mean of its divisors is an integer number (1446491495862).

Almost surely, 2^{20013123701747} is an apocalyptic number.

20013123701747 is a deficient number, since it is larger than the sum of its proper divisors (3130740232045).

20013123701747 is a wasteful number, since it uses less digits than its factorization.

20013123701747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125466358.

The product of its (nonzero) digits is 49392, while the sum is 38.

Adding to 20013123701747 its reverse (74710732131002), we get a palindrome (94723855832749).

The spelling of 20013123701747 in words is "twenty trillion, thirteen billion, one hundred twenty-three million, seven hundred one thousand, seven hundred forty-seven".