20015133 has 8 divisors (see below), whose sum is σ = 27607200. Its totient is φ = 12883248.

The previous prime is 20015131. The next prime is 20015143. The reversal of 20015133 is 33151002.

It is a happy number.

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

It is not a de Polignac number, because 20015133 - 2¹ = 20015131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 114943 + ... + 115116.

It is an arithmetic number, because the mean of its divisors is an integer number (3450900).

Almost surely, 2^20015133 is an apocalyptic number.

It is an amenable number.

20015133 is a deficient number, since it is larger than the sum of its proper divisors (7592067).

20015133 is a wasteful number, since it uses less digits than its factorization.

20015133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230091.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20015133 is about 4473.8275559078. The cubic root of 20015133 is about 271.5102065358.

Adding to 20015133 its reverse (33151002), we get a palindrome (53166135).

The spelling of 20015133 in words is "twenty million, fifteen thousand, one hundred thirty-three".