20033100 has 54 divisors (see below), whose sum is σ = 62795460. Its totient is φ = 5341920.

The previous prime is 20033093. The next prime is 20033137. The reversal of 20033100 is 133002.

It is a happy number.

It is a super-2 number, since 2×20033100² = 802650191220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10230 + ... + 12029.

Almost surely, 2^20033100 is an apocalyptic number.

20033100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20033100 is an abundant number, since it is smaller than the sum of its proper divisors (42762360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20033100 is a wasteful number, since it uses less digits than its factorization.

20033100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22279 (or 22269 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 20033100 is about 4475.8351176065. The cubic root of 20033100 is about 271.5914244977.

Adding to 20033100 its reverse (133002), we get a palindrome (20166102).

The spelling of 20033100 in words is "twenty million, thirty-three thousand, one hundred".