20333240 has 16 divisors (see below), whose sum is σ = 45749880. Its totient is φ = 8133280.

The previous prime is 20333233. The next prime is 20333251. The reversal of 20333240 is 4233302.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 254126 + ... + 254205.

Almost surely, 2^20333240 is an apocalyptic number.

20333240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20333240 is an abundant number, since it is smaller than the sum of its proper divisors (25416640).

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

20333240 is a wasteful number, since it uses less digits than its factorization.

20333240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508342 (or 508338 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 20333240 is about 4509.2394037132. The cubic root of 20333240 is about 272.9410527193.

Adding to 20333240 its reverse (4233302), we get a palindrome (24566542).

The spelling of 20333240 in words is "twenty million, three hundred thirty-three thousand, two hundred forty".