20412915 has 8 divisors (see below), whose sum is σ = 32660688. Its totient is φ = 10886880.

The previous prime is 20412913. The next prime is 20412923. The reversal of 20412915 is 51921402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20412915 - 2¹ = 20412913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20412913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680416 + ... + 680445.

It is an arithmetic number, because the mean of its divisors is an integer number (4082586).

Almost surely, 2^20412915 is an apocalyptic number.

20412915 is a deficient number, since it is larger than the sum of its proper divisors (12247773).

20412915 is a wasteful number, since it uses less digits than its factorization.

20412915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360869.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20412915 is about 4518.0654045731. The cubic root of 20412915 is about 273.2970910041.

It can be divided in two parts, 204 and 12915, that multiplied together give a triangular number (2634660 = T₂₂₉₅).

The spelling of 20412915 in words is "twenty million, four hundred twelve thousand, nine hundred fifteen".