20743404 has 48 divisors (see below), whose sum is σ = 53174016. Its totient is φ = 6241600.

The previous prime is 20743391. The next prime is 20743409. The reversal of 20743404 is 40434702.

It is not an unprimeable number, because it can be changed into a prime (20743409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21574 + ... + 22514.

It is an arithmetic number, because the mean of its divisors is an integer number (1107792).

Almost surely, 2^20743404 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 20743404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26587008).

20743404 is an abundant number, since it is smaller than the sum of its proper divisors (32430612).

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

20743404 is a wasteful number, since it uses less digits than its factorization.

20743404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 20743404 is about 4554.4927269675. The cubic root of 20743404 is about 274.7641128721.

The spelling of 20743404 in words is "twenty million, seven hundred forty-three thousand, four hundred four".