20834436 has 48 divisors (see below), whose sum is σ = 56153216. Its totient is φ = 5889024.

The previous prime is 20834417. The next prime is 20834461. The reversal of 20834436 is 63443802.

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, 6870 + ... + 9426.

Almost surely, 2^20834436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20834436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28076608).

20834436 is an abundant number, since it is smaller than the sum of its proper divisors (35318780).

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

20834436 is a wasteful number, since it uses less digits than its factorization.

20834436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668 (or 2666 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 20834436 is about 4564.4754353595. The cubic root of 20834436 is about 275.1654585557.

The spelling of 20834436 in words is "twenty million, eight hundred thirty-four thousand, four hundred thirty-six".