20015229 has 16 divisors (see below), whose sum is σ = 28828352. Its totient is φ = 12279168.

The previous prime is 20015207. The next prime is 20015231. The reversal of 20015229 is 92251002.

It is not a de Polignac number, because 20015229 - 2¹⁵ = 19982461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17262 + ... + 18384.

It is an arithmetic number, because the mean of its divisors is an integer number (1801772).

Almost surely, 2^20015229 is an apocalyptic number.

It is an amenable number.

20015229 is a deficient number, since it is larger than the sum of its proper divisors (8813123).

20015229 is a wasteful number, since it uses less digits than its factorization.

20015229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20015229 is about 4473.8382849629. The cubic root of 20015229 is about 271.5106406230.

The spelling of 20015229 in words is "twenty million, fifteen thousand, two hundred twenty-nine".