20228615 has 16 divisors (see below), whose sum is σ = 27634176. Its totient is φ = 14071200.

The previous prime is 20228587. The next prime is 20228639. The reversal of 20228615 is 51682202.

It is not a de Polignac number, because 20228615 - 2²⁰ = 19180039 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6731 + ... + 9260.

It is an arithmetic number, because the mean of its divisors is an integer number (1727136).

Almost surely, 2^20228615 is an apocalyptic number.

20228615 is a deficient number, since it is larger than the sum of its proper divisors (7405561).

20228615 is a wasteful number, since it uses less digits than its factorization.

20228615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16030.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20228615 is about 4497.6232612348. The cubic root of 20228615 is about 272.4721066755.

The spelling of 20228615 in words is "twenty million, two hundred twenty-eight thousand, six hundred fifteen".