20044742663 has 16 divisors (see below), whose sum is σ = 22006083456. Its totient is φ = 18106955040.

The previous prime is 20044742651. The next prime is 20044742671. The reversal of 20044742663 is 36624744002.

It is a cyclic number.

It is not a de Polignac number, because 20044742663 - 2⁴ = 20044742647 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 (20044742363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1109420 + ... + 1127342.

It is an arithmetic number, because the mean of its divisors is an integer number (1375380216).

Almost surely, 2^20044742663 is an apocalyptic number.

20044742663 is a deficient number, since it is larger than the sum of its proper divisors (1961340793).

20044742663 is a wasteful number, since it uses less digits than its factorization.

20044742663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18574.

The product of its (nonzero) digits is 193536, while the sum is 38.

The spelling of 20044742663 in words is "twenty billion, forty-four million, seven hundred forty-two thousand, six hundred sixty-three".