20335040 has 112 divisors (see below), whose sum is σ = 54315360. Its totient is φ = 7188480.

The previous prime is 20335033. The next prime is 20335097. The reversal of 20335040 is 4053302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186506 + ... + 186614.

Almost surely, 2^20335040 is an apocalyptic number.

20335040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20335040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27157680).

20335040 is an abundant number, since it is smaller than the sum of its proper divisors (33980320).

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

20335040 is a wasteful number, since it uses less digits than its factorization.

20335040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20335040 is about 4509.4389894975. The cubic root of 20335040 is about 272.9491065169.

Adding to 20335040 its reverse (4053302), we get a palindrome (24388342).

The spelling of 20335040 in words is "twenty million, three hundred thirty-five thousand, forty".