20412615 has 16 divisors (see below), whose sum is σ = 34080768. Its totient is φ = 10413216.

The previous prime is 20412599. The next prime is 20412647. The reversal of 20412615 is 51621402.

It is not a de Polignac number, because 20412615 - 2⁴ = 20412599 is a prime.

It is a super-2 number, since 2×20412615² = 833349702276450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20412591 and 20412600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29239 + ... + 29928.

It is an arithmetic number, because the mean of its divisors is an integer number (2130048).

Almost surely, 2^20412615 is an apocalyptic number.

20412615 is a deficient number, since it is larger than the sum of its proper divisors (13668153).

20412615 is a wasteful number, since it uses less digits than its factorization.

20412615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59198.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20412615 is about 4518.0322044005. The cubic root of 20412615 is about 273.2957521535.

It can be divided in two parts, 2041 and 2615, that added together give a triangular number (4656 = T₉₆).

The spelling of 20412615 in words is "twenty million, four hundred twelve thousand, six hundred fifteen".