20307452 has 36 divisors (see below), whose sum is σ = 41209224. Its totient is φ = 8682240.

The previous prime is 20307439. The next prime is 20307457. The reversal of 20307452 is 25470302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20307457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11918 + ... + 13514.

Almost surely, 2^20307452 is an apocalyptic number.

20307452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20307452 is an abundant number, since it is smaller than the sum of its proper divisors (20901772).

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

20307452 is a wasteful number, since it uses less digits than its factorization.

20307452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20307452 is about 4506.3790342136. The cubic root of 20307452 is about 272.8256164259.

Adding to 20307452 its reverse (25470302), we get a palindrome (45777754).

The spelling of 20307452 in words is "twenty million, three hundred seven thousand, four hundred fifty-two".