20012415 has 64 divisors (see below), whose sum is σ = 36495360. Its totient is φ = 9313920.

The previous prime is 20012411. The next prime is 20012423. The reversal of 20012415 is 51421002.

It is not a de Polignac number, because 20012415 - 2² = 20012411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 20012394 and 20012403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 281830 + ... + 281900.

It is an arithmetic number, because the mean of its divisors is an integer number (570240).

Almost surely, 2^20012415 is an apocalyptic number.

20012415 is a deficient number, since it is larger than the sum of its proper divisors (16482945).

20012415 is a wasteful number, since it uses less digits than its factorization.

20012415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20012415 is about 4473.5237788571. The cubic root of 20012415 is about 271.4979158664.

20012415 divided by its sum of digits (15) gives a triangular number (1334161 = T₁₆₃₃).

Adding to 20012415 its reverse (51421002), we get a palindrome (71433417).

The spelling of 20012415 in words is "twenty million, twelve thousand, four hundred fifteen".