20349312 has 64 divisors (see below), whose sum is σ = 54529200. Its totient is φ = 6723584.

The previous prime is 20349293. The next prime is 20349347. The reversal of 20349312 is 21394302.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75514 + ... + 75782.

Almost surely, 2^20349312 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 20349312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27264600).

20349312 is an abundant number, since it is smaller than the sum of its proper divisors (34179888).

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

20349312 is a wasteful number, since it uses less digits than its factorization.

20349312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20349312 is about 4511.0211704225. The cubic root of 20349312 is about 273.0129473659.

The spelling of 20349312 in words is "twenty million, three hundred forty-nine thousand, three hundred twelve".