20147389423 has 12 divisors (see below), whose sum is σ = 24301246800. Its totient is φ = 16360284096.

The previous prime is 20147389421. The next prime is 20147389429. The reversal of 20147389423 is 32498374102.

It is not a de Polignac number, because 20147389423 - 2¹ = 20147389421 is a prime.

It is the 141942-nd Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20147389423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147389421) by changing a digit.

It is a nontrivial repunit in base 141941.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3983898 + ... + 3988951.

It is an arithmetic number, because the mean of its divisors is an integer number (2025103900).

Almost surely, 2^20147389423 is an apocalyptic number.

20147389423 is a deficient number, since it is larger than the sum of its proper divisors (4153857377).

20147389423 is an equidigital number, since it uses as much as digits as its factorization.

20147389423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7972894 (or 7972875 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 20147389423 in words is "twenty billion, one hundred forty-seven million, three hundred eighty-nine thousand, four hundred twenty-three".