20033040 has 40 divisors (see below), whose sum is σ = 62103168. Its totient is φ = 5342080.

The previous prime is 20033029. The next prime is 20033053. The reversal of 20033040 is 4033002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41496 + ... + 41975.

Almost surely, 2^20033040 is an apocalyptic number.

20033040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20033040 is an abundant number, since it is smaller than the sum of its proper divisors (42070128).

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

20033040 is a wasteful number, since it uses less digits than its factorization.

20033040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83487 (or 83481 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20033040 is about 4475.8284149418. The cubic root of 20033040 is about 271.5911533547.

Adding to 20033040 its reverse (4033002), we get a palindrome (24066042).

The spelling of 20033040 in words is "twenty million, thirty-three thousand, forty".