20637672037013 has 4 divisors (see below), whose sum is σ = 20637835254348. Its totient is φ = 20637508819680.

The previous prime is 20637672037009. The next prime is 20637672037043. The reversal of 20637672037013 is 31073027673602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14179125808324 + 6458546228689 = 3765518^2 + 2541367^2 .

It is a cyclic number.

It is not a de Polignac number, because 20637672037013 - 2² = 20637672037009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20637672037043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81418856 + ... + 81671937.

It is an arithmetic number, because the mean of its divisors is an integer number (5159458813587).

Almost surely, 2^{20637672037013} is an apocalyptic number.

It is an amenable number.

20637672037013 is a deficient number, since it is larger than the sum of its proper divisors (163217335).

20637672037013 is a wasteful number, since it uses less digits than its factorization.

20637672037013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163217334.

The product of its (nonzero) digits is 1333584, while the sum is 47.

The spelling of 20637672037013 in words is "twenty trillion, six hundred thirty-seven billion, six hundred seventy-two million, thirty-seven thousand, thirteen".