20747152 has 20 divisors (see below), whose sum is σ = 40268380. Its totient is φ = 10355328.

The previous prime is 20747149. The next prime is 20747161. The reversal of 20747152 is 25174702.

It can be written as a sum of positive squares in 2 ways, for example, as 4393216 + 16353936 = 2096^2 + 4044^2 .

It is a super-2 number, since 2×20747152² = 860888632222208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20747152.

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 3 ways as a sum of consecutive naturals, for example, 16498 + ... + 17710.

It is an arithmetic number, because the mean of its divisors is an integer number (2013419).

Almost surely, 2^20747152 is an apocalyptic number.

It is an amenable number.

20747152 is a deficient number, since it is larger than the sum of its proper divisors (19521228).

20747152 is a wasteful number, since it uses less digits than its factorization.

20747152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290 (or 2284 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 20747152 is about 4554.9041702323. The cubic root of 20747152 is about 274.7806603632.

The spelling of 20747152 in words is "twenty million, seven hundred forty-seven thousand, one hundred fifty-two".