20749352 has 32 divisors (see below), whose sum is σ = 42245280. Its totient is φ = 9497280.

The previous prime is 20749343. The next prime is 20749369. The reversal of 20749352 is 25394702.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12863 + ... + 14385.

It is an arithmetic number, because the mean of its divisors is an integer number (1320165).

Almost surely, 2^20749352 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 20749352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21122640).

20749352 is an abundant number, since it is smaller than the sum of its proper divisors (21495928).

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

20749352 is a wasteful number, since it uses less digits than its factorization.

20749352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1669 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20749352 is about 4555.1456617764. The cubic root of 20749352 is about 274.7903724767.

The spelling of 20749352 in words is "twenty million, seven hundred forty-nine thousand, three hundred fifty-two".