20720001668707 has 8 divisors (see below), whose sum is σ = 23933263959792. Its totient is φ = 17728343673600.

The previous prime is 20720001668701. The next prime is 20720001668713. The reversal of 20720001668707 is 70786610002702.

It is an interprime number because it is at equal distance from previous prime (20720001668701) and next prime (20720001668713).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20720001668707 - 2¹¹ = 20720001666659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20720001668701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55401073794 + ... + 55401074167.

It is an arithmetic number, because the mean of its divisors is an integer number (2991657994974).

Almost surely, 2^{20720001668707} is an apocalyptic number.

20720001668707 is a deficient number, since it is larger than the sum of its proper divisors (3213262291085).

20720001668707 is a wasteful number, since it uses less digits than its factorization.

20720001668707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110802147989.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 20720001668707 in words is "twenty trillion, seven hundred twenty billion, one million, six hundred sixty-eight thousand, seven hundred seven".