20115234 has 12 divisors (see below), whose sum is σ = 43583046. Its totient is φ = 6705072.

The previous prime is 20115211. The next prime is 20115247. The reversal of 20115234 is 43251102.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 9 = 4485^2 + 3^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1117513 = 20115234 / (2 + 0 + 1 + 1 + 5 + 2 + 3 + 4).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558739 + ... + 558774.

Almost surely, 2^20115234 is an apocalyptic number.

20115234 is an abundant number, since it is smaller than the sum of its proper divisors (23467812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20115234 is a wasteful number, since it uses less digits than its factorization.

20115234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117521 (or 1117518 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20115234 is about 4485.0010033444. The cubic root of 20115234 is about 271.9620856179.

Adding to 20115234 its reverse (43251102), we get a palindrome (63366336).

The spelling of 20115234 in words is "twenty million, one hundred fifteen thousand, two hundred thirty-four".