20413615 has 8 divisors (see below), whose sum is σ = 24739488. Its totient is φ = 16168800.

The previous prime is 20413607. The next prime is 20413621. The reversal of 20413615 is 51631402.

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

It is not a de Polignac number, because 20413615 - 2³ = 20413607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 19707 + ... + 20716.

It is an arithmetic number, because the mean of its divisors is an integer number (3092436).

Almost surely, 2^20413615 is an apocalyptic number.

20413615 is a deficient number, since it is larger than the sum of its proper divisors (4325873).

20413615 is a wasteful number, since it uses less digits than its factorization.

20413615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40529.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20413615 is about 4518.1428706937. The cubic root of 20413615 is about 273.3002149377.

The spelling of 20413615 in words is "twenty million, four hundred thirteen thousand, six hundred fifteen".