20032493 has 4 divisors (see below), whose sum is σ = 21573468. Its totient is φ = 18491520.

The previous prime is 20032489. The next prime is 20032499. The reversal of 20032493 is 39423002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11377129 + 8655364 = 3373^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 20032493 - 2² = 20032489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032499) 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, 770468 + ... + 770493.

It is an arithmetic number, because the mean of its divisors is an integer number (5393367).

Almost surely, 2^20032493 is an apocalyptic number.

It is an amenable number.

20032493 is a deficient number, since it is larger than the sum of its proper divisors (1540975).

20032493 is a wasteful number, since it uses less digits than its factorization.

20032493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540974.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20032493 is about 4475.7673085182. The cubic root of 20032493 is about 271.5886814098.

Adding to 20032493 its reverse (39423002), we get a palindrome (59455495).

The spelling of 20032493 in words is "twenty million, thirty-two thousand, four hundred ninety-three".