20024155 has 8 divisors (see below), whose sum is σ = 24124032. Its totient is φ = 15955968.

The previous prime is 20024153. The next prime is 20024161. The reversal of 20024155 is 55142002.

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

It is a cyclic number.

It is not a de Polignac number, because 20024155 - 2¹ = 20024153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20024153) 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 7 ways as a sum of consecutive naturals, for example, 6507 + ... + 9076.

It is an arithmetic number, because the mean of its divisors is an integer number (3015504).

Almost surely, 2^20024155 is an apocalyptic number.

20024155 is a deficient number, since it is larger than the sum of its proper divisors (4099877).

20024155 is a wasteful number, since it uses less digits than its factorization.

20024155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15845.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20024155 is about 4474.8357511757. The cubic root of 20024155 is about 271.5509956247.

Adding to 20024155 its reverse (55142002), we get a palindrome (75166157).

The spelling of 20024155 in words is "twenty million, twenty-four thousand, one hundred fifty-five".