20251332 has 18 divisors (see below), whose sum is σ = 51190958. Its totient is φ = 6750432.

The previous prime is 20251303. The next prime is 20251333. The reversal of 20251332 is 23315202.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 484416 = 4446^2 + 696^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20251333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281233 + ... + 281304.

Almost surely, 2^20251332 is an apocalyptic number.

It is an amenable number.

20251332 is an abundant number, since it is smaller than the sum of its proper divisors (30939626).

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

20251332 is a wasteful number, since it uses less digits than its factorization.

20251332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562547 (or 562542 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20251332 is about 4500.1479975663. The cubic root of 20251332 is about 272.5740651015.

Adding to 20251332 its reverse (23315202), we get a palindrome (43566534).

The spelling of 20251332 in words is "twenty million, two hundred fifty-one thousand, three hundred thirty-two".