20637144663 has 8 divisors (see below), whose sum is σ = 27524437248. Its totient is φ = 13753974264.

The previous prime is 20637144623. The next prime is 20637144673. The reversal of 20637144663 is 36644173602.

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

It is a de Polignac number, because none of the positive numbers 2^k-20637144663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20637144613) 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, 1018845 + ... + 1038902.

It is an arithmetic number, because the mean of its divisors is an integer number (3440554656).

Almost surely, 2^20637144663 is an apocalyptic number.

20637144663 is a deficient number, since it is larger than the sum of its proper divisors (6887292585).

20637144663 is a wasteful number, since it uses less digits than its factorization.

20637144663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061093.

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 20637144663 in words is "twenty billion, six hundred thirty-seven million, one hundred forty-four thousand, six hundred sixty-three".