20983404 has 48 divisors (see below), whose sum is σ = 54440960. Its totient is φ = 6246720.

The previous prime is 20983399. The next prime is 20983439. The reversal of 20983404 is 40438902.

It is a happy 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, 2667 + ... + 7005.

Almost surely, 2^20983404 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 20983404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27220480).

20983404 is an abundant number, since it is smaller than the sum of its proper divisors (33457556).

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

20983404 is a wasteful number, since it uses less digits than its factorization.

20983404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390 (or 4388 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20983404 is about 4580.7645650044. The cubic root of 20983404 is about 275.8197205388.

The spelling of 20983404 in words is "twenty million, nine hundred eighty-three thousand, four hundred four".