20447142763 has 4 divisors (see below), whose sum is σ = 20447728560. Its totient is φ = 20446556968.

The previous prime is 20447142743. The next prime is 20447142769. The reversal of 20447142763 is 36724174402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20447142763 - 2⁵ = 20447142731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20447142769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236983 + ... + 311536.

It is an arithmetic number, because the mean of its divisors is an integer number (5111932140).

Almost surely, 2^20447142763 is an apocalyptic number.

20447142763 is a deficient number, since it is larger than the sum of its proper divisors (585797).

20447142763 is an equidigital number, since it uses as much as digits as its factorization.

20447142763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585796.

The product of its (nonzero) digits is 225792, while the sum is 40.

The spelling of 20447142763 in words is "twenty billion, four hundred forty-seven million, one hundred forty-two thousand, seven hundred sixty-three".