20289952 has 12 divisors (see below), whose sum is σ = 39945906. Its totient is φ = 10144960.

The previous prime is 20289911. The next prime is 20289977. The reversal of 20289952 is 25998202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 1245456 = 4364^2 + 1116^2 .

It is a super-3 number, since 3×20289952³ (a number of 23 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 316999 + ... + 317062.

Almost surely, 2^20289952 is an apocalyptic number.

It is an amenable number.

20289952 is a deficient number, since it is larger than the sum of its proper divisors (19655954).

20289952 is an equidigital number, since it uses as much as digits as its factorization.

20289952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634071 (or 634063 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20289952 is about 4504.4369237453. The cubic root of 20289952 is about 272.7472245067.

The spelling of 20289952 in words is "twenty million, two hundred eighty-nine thousand, nine hundred fifty-two".