20427619663 has 64 divisors (see below), whose sum is σ = 24825692160. Its totient is φ = 16740108000.

The previous prime is 20427619661. The next prime is 20427619669. The reversal of 20427619663 is 36691672402.

It is not a de Polignac number, because 20427619663 - 2¹ = 20427619661 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 (20427619661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55660906 + ... + 55661272.

It is an arithmetic number, because the mean of its divisors is an integer number (387901440).

Almost surely, 2^20427619663 is an apocalyptic number.

20427619663 is a deficient number, since it is larger than the sum of its proper divisors (4398072497).

20427619663 is a wasteful number, since it uses less digits than its factorization.

20427619663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 20427619663 in words is "twenty billion, four hundred twenty-seven million, six hundred nineteen thousand, six hundred sixty-three".