20334440 has 32 divisors (see below), whose sum is σ = 52289280. Its totient is φ = 6971712.

The previous prime is 20334439. The next prime is 20334451. The reversal of 20334440 is 4443302.

It is a happy number.

It is a super-2 number, since 2×20334440² = 826978900227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 36032 + ... + 36591.

It is an arithmetic number, because the mean of its divisors is an integer number (1634040).

Almost surely, 2^20334440 is an apocalyptic number.

20334440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20334440 is an abundant number, since it is smaller than the sum of its proper divisors (31954840).

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

20334440 is a wasteful number, since it uses less digits than its factorization.

20334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72641 (or 72637 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 20334440 is about 4509.3724618842. The cubic root of 20334440 is about 272.9464219705.

Adding to 20334440 its reverse (4443302), we get a palindrome (24777742).

It can be divided in two parts, 203 and 34440, that added together give a palindrome (34643).

The spelling of 20334440 in words is "twenty million, three hundred thirty-four thousand, four hundred forty".