20346129 has 6 divisors (see below), whose sum is σ = 29388866. Its totient is φ = 13564080.

The previous prime is 20346121. The next prime is 20346187. The reversal of 20346129 is 92164302.

It can be written as a sum of positive squares in only one way, i.e., 16184529 + 4161600 = 4023^2 + 2040^2 .

It is not a de Polignac number, because 20346129 - 2³ = 20346121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20346121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1130332 + ... + 1130349.

Almost surely, 2^20346129 is an apocalyptic number.

It is an amenable number.

20346129 is a deficient number, since it is larger than the sum of its proper divisors (9042737).

20346129 is a wasteful number, since it uses less digits than its factorization.

20346129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260687 (or 2260684 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20346129 is about 4510.6683540247. The cubic root of 20346129 is about 272.9987119047.

The spelling of 20346129 in words is "twenty million, three hundred forty-six thousand, one hundred twenty-nine".