20890152 has 24 divisors (see below), whose sum is σ = 56577690. Its totient is φ = 6963360.

The previous prime is 20890099. The next prime is 20890183. The reversal of 20890152 is 25109802.

It can be written as a sum of positive squares in only one way, i.e., 19131876 + 1758276 = 4374^2 + 1326^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 5 ways as a sum of consecutive naturals, for example, 144999 + ... + 145142.

Almost surely, 2^20890152 is an apocalyptic number.

It is an amenable number.

20890152 is an abundant number, since it is smaller than the sum of its proper divisors (35687538).

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

20890152 is a wasteful number, since it uses less digits than its factorization.

20890152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290153 (or 290146 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20890152 is about 4570.5745809471. The cubic root of 20890152 is about 275.4105251474.

Adding to 20890152 its reverse (25109802), we get a palindrome (45999954).

The spelling of 20890152 in words is "twenty million, eight hundred ninety thousand, one hundred fifty-two".