21339423147 has 16 divisors (see below), whose sum is σ = 32522561280. Its totient is φ = 12191951712.

The previous prime is 21339423139. The next prime is 21339423163. The reversal of 21339423147 is 74132493312.

It is not a de Polignac number, because 21339423147 - 2³ = 21339423139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21339423167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52429 + ... + 213137.

It is an arithmetic number, because the mean of its divisors is an integer number (2032660080).

Almost surely, 2^21339423147 is an apocalyptic number.

21339423147 is a deficient number, since it is larger than the sum of its proper divisors (11183138133).

21339423147 is a wasteful number, since it uses less digits than its factorization.

21339423147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167042.

The product of its digits is 108864, while the sum is 39.

The spelling of 21339423147 in words is "twenty-one billion, three hundred thirty-nine million, four hundred twenty-three thousand, one hundred forty-seven".