20749416 has 48 divisors (see below), whose sum is σ = 53869440. Its totient is φ = 6653280.

The previous prime is 20749369. The next prime is 20749423. The reversal of 20749416 is 61494702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124165 + ... + 124331.

It is an arithmetic number, because the mean of its divisors is an integer number (1122280).

Almost surely, 2^20749416 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 20749416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26934720).

20749416 is an abundant number, since it is smaller than the sum of its proper divisors (33120024).

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

20749416 is a wasteful number, since it uses less digits than its factorization.

20749416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20749416 is about 4555.1526867933. The cubic root of 20749416 is about 274.7906550007.

The spelling of 20749416 in words is "twenty million, seven hundred forty-nine thousand, four hundred sixteen".