20445779763 has 24 divisors (see below), whose sum is σ = 29844706320. Its totient is φ = 13486737600.

The previous prime is 20445779747. The next prime is 20445779801. The reversal of 20445779763 is 36797754402.

20445779763 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 577 + 9 + 7 + 63 = 666.

It is not a de Polignac number, because 20445779763 - 2⁴ = 20445779747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20445779713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1568808 + ... + 1581786.

It is an arithmetic number, because the mean of its divisors is an integer number (1243529430).

Almost surely, 2^20445779763 is an apocalyptic number.

20445779763 is a deficient number, since it is larger than the sum of its proper divisors (9398926557).

20445779763 is a wasteful number, since it uses less digits than its factorization.

20445779763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14819 (or 14816 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 20445779763 in words is "twenty billion, four hundred forty-five million, seven hundred seventy-nine thousand, seven hundred sixty-three".