20228637423 has 4 divisors (see below), whose sum is σ = 26971516568. Its totient is φ = 13485758280.

The previous prime is 20228637419. The next prime is 20228637469. The reversal of 20228637423 is 32473682202.

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

It is not a de Polignac number, because 20228637423 - 2² = 20228637419 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 (20228637493) 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, 3371439568 + ... + 3371439573.

It is an arithmetic number, because the mean of its divisors is an integer number (6742879142).

Almost surely, 2^20228637423 is an apocalyptic number.

20228637423 is a deficient number, since it is larger than the sum of its proper divisors (6742879145).

20228637423 is an equidigital number, since it uses as much as digits as its factorization.

20228637423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742879144.

The product of its (nonzero) digits is 193536, while the sum is 39.

The spelling of 20228637423 in words is "twenty billion, two hundred twenty-eight million, six hundred thirty-seven thousand, four hundred twenty-three".