20835384 has 32 divisors (see below), whose sum is σ = 52200720. Its totient is φ = 6930176.

The previous prime is 20835359. The next prime is 20835389. The reversal of 20835384 is 48353802.

It is a super-2 number, since 2×20835384² = 868226452854912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20835389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20062 + ... + 21074.

Almost surely, 2^20835384 is an apocalyptic number.

20835384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20835384 is an abundant number, since it is smaller than the sum of its proper divisors (31365336).

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

20835384 is a wasteful number, since it uses less digits than its factorization.

20835384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 20835384 is about 4564.5792796270. The cubic root of 20835384 is about 275.1696319812.

The spelling of 20835384 in words is "twenty million, eight hundred thirty-five thousand, three hundred eighty-four".