20524493 has 4 divisors (see below), whose sum is σ = 22390368. Its totient is φ = 18658620.

The previous prime is 20524451. The next prime is 20524499. The reversal of 20524493 is 39442502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20524493 - 2⁶ = 20524429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932921 + ... + 932942.

It is an arithmetic number, because the mean of its divisors is an integer number (5597592).

Almost surely, 2^20524493 is an apocalyptic number.

It is an amenable number.

20524493 is a deficient number, since it is larger than the sum of its proper divisors (1865875).

20524493 is a wasteful number, since it uses less digits than its factorization.

20524493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865874.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20524493 is about 4530.3965610088. The cubic root of 20524493 is about 273.7941382650.

Adding to 20524493 its reverse (39442502), we get a palindrome (59966995).

The spelling of 20524493 in words is "twenty million, five hundred twenty-four thousand, four hundred ninety-three".