20452437 has 6 divisors (see below), whose sum is σ = 29542422. Its totient is φ = 13634952.

The previous prime is 20452429. The next prime is 20452463. The reversal of 20452437 is 73425402.

It can be written as a sum of positive squares in only one way, i.e., 20439441 + 12996 = 4521^2 + 114^2 .

It is not a de Polignac number, because 20452437 - 2³ = 20452429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20452437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452427) 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, 1136238 + ... + 1136255.

It is an arithmetic number, because the mean of its divisors is an integer number (4923737).

Almost surely, 2^20452437 is an apocalyptic number.

It is an amenable number.

20452437 is a deficient number, since it is larger than the sum of its proper divisors (9089985).

20452437 is a wasteful number, since it uses less digits than its factorization.

20452437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272499 (or 2272496 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20452437 is about 4522.4370642387. The cubic root of 20452437 is about 273.4733566061.

Adding to 20452437 its reverse (73425402), we get a palindrome (93877839).

The spelling of 20452437 in words is "twenty million, four hundred fifty-two thousand, four hundred thirty-seven".