20311750007639 has 8 divisors (see below), whose sum is σ = 20314156419840. Its totient is φ = 20309343772536.

The previous prime is 20311750007629. The next prime is 20311750007641. The reversal of 20311750007639 is 93670005711302.

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 20311750007639 - 2⁴ = 20311750007623 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 20311750007639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311750007629) 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, 447343112 + ... + 447388514.

It is an arithmetic number, because the mean of its divisors is an integer number (2539269552480).

Almost surely, 2^{20311750007639} is an apocalyptic number.

20311750007639 is a deficient number, since it is larger than the sum of its proper divisors (2406412201).

20311750007639 is a wasteful number, since it uses less digits than its factorization.

20311750007639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88549.

The product of its (nonzero) digits is 238140, while the sum is 44.

The spelling of 20311750007639 in words is "twenty trillion, three hundred eleven billion, seven hundred fifty million, seven thousand, six hundred thirty-nine".