20808114637 has 8 divisors (see below), whose sum is σ = 21029299200. Its totient is φ = 20587227600.

The previous prime is 20808114619. The next prime is 20808114643. The reversal of 20808114637 is 73641180802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20808114637 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 20808114637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808114647) 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, 67668 + ... + 214930.

It is an arithmetic number, because the mean of its divisors is an integer number (2628662400).

Almost surely, 2^20808114637 is an apocalyptic number.

It is an amenable number.

20808114637 is a deficient number, since it is larger than the sum of its proper divisors (221184563).

20808114637 is a wasteful number, since it uses less digits than its factorization.

20808114637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148763.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 20808114637 in words is "twenty billion, eight hundred eight million, one hundred fourteen thousand, six hundred thirty-seven".