20342493 has 12 divisors (see below), whose sum is σ = 30009408. Its totient is φ = 13272840.

The previous prime is 20342471. The next prime is 20342501. The reversal of 20342493 is 39424302.

It is a happy number.

It is not a de Polignac number, because 20342493 - 2⁵ = 20342461 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23623 + ... + 24468.

It is an arithmetic number, because the mean of its divisors is an integer number (2500784).

Almost surely, 2^20342493 is an apocalyptic number.

It is an amenable number.

20342493 is a deficient number, since it is larger than the sum of its proper divisors (9666915).

20342493 is a wasteful number, since it uses less digits than its factorization.

20342493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48144 (or 48141 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 20342493 is about 4510.2652915322. The cubic root of 20342493 is about 272.9824486563.

Adding to 20342493 its reverse (39424302), we get a palindrome (59766795).

The spelling of 20342493 in words is "twenty million, three hundred forty-two thousand, four hundred ninety-three".