20134815 has 16 divisors (see below), whose sum is σ = 32400000. Its totient is φ = 10677152.

The previous prime is 20134811. The next prime is 20134837. The reversal of 20134815 is 51843102.

It is a cyclic number.

It is not a de Polignac number, because 20134815 - 2² = 20134811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20134811) 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, 1065 + ... + 6434.

It is an arithmetic number, because the mean of its divisors is an integer number (2025000).

Almost surely, 2^20134815 is an apocalyptic number.

20134815 is a deficient number, since it is larger than the sum of its proper divisors (12265185).

20134815 is a wasteful number, since it uses less digits than its factorization.

20134815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7686.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20134815 is about 4487.1834150166. The cubic root of 20134815 is about 272.0503033766.

Adding to 20134815 its reverse (51843102), we get a palindrome (71977917).

The spelling of 20134815 in words is "twenty million, one hundred thirty-four thousand, eight hundred fifteen".