20033145 has 24 divisors (see below), whose sum is σ = 37881792. Its totient is φ = 9712800.

The previous prime is 20033137. The next prime is 20033159. The reversal of 20033145 is 54133002.

It is not a de Polignac number, because 20033145 - 2³ = 20033137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19741 + ... + 20730.

It is an arithmetic number, because the mean of its divisors is an integer number (1578408).

Almost surely, 2^20033145 is an apocalyptic number.

It is an amenable number.

20033145 is a deficient number, since it is larger than the sum of its proper divisors (17848647).

20033145 is a wasteful number, since it uses less digits than its factorization.

20033145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40493 (or 40490 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20033145 is about 4475.8401445986. The cubic root of 20033145 is about 271.5916278545.

Adding to 20033145 its reverse (54133002), we get a palindrome (74166147).

The spelling of 20033145 in words is "twenty million, thirty-three thousand, one hundred forty-five".