20334840 has 32 divisors (see below), whose sum is σ = 61004880. Its totient is φ = 5422592.

The previous prime is 20334833. The next prime is 20334863. The reversal of 20334840 is 4843302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20334840.

It is a congruent number.

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, 84609 + ... + 84848.

Almost surely, 2^20334840 is an apocalyptic number.

20334840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20334840 is an abundant number, since it is smaller than the sum of its proper divisors (40670040).

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

20334840 is a wasteful number, since it uses less digits than its factorization.

20334840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169471 (or 169467 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20334840 is about 4509.4168137355. The cubic root of 20334840 is about 272.9482116740.

The spelling of 20334840 in words is "twenty million, three hundred thirty-four thousand, eight hundred forty".