20242537 has 6 divisors (see below), whose sum is σ = 23547498. Its totient is φ = 17350704.

The previous prime is 20242511. The next prime is 20242549. The reversal of 20242537 is 73524202.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 670761 = 4424^2 + 819^2 .

It is not a de Polignac number, because 20242537 - 2¹⁵ = 20209769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20242567) by changing a digit.

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, 206508 + ... + 206605.

It is an arithmetic number, because the mean of its divisors is an integer number (3924583).

Almost surely, 2^20242537 is an apocalyptic number.

It is an amenable number.

20242537 is a deficient number, since it is larger than the sum of its proper divisors (3304961).

20242537 is an equidigital number, since it uses as much as digits as its factorization.

20242537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413127 (or 413120 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20242537 is about 4499.1707013626. The cubic root of 20242537 is about 272.5346004377.

Adding to 20242537 its reverse (73524202), we get a palindrome (93766739).

The spelling of 20242537 in words is "twenty million, two hundred forty-two thousand, five hundred thirty-seven".