20380493 has 8 divisors (see below), whose sum is σ = 23506560. Its totient is φ = 17308080.

The previous prime is 20380489. The next prime is 20380537. The reversal of 20380493 is 39408302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20380493 - 2² = 20380489 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12593 + ... + 14118.

It is an arithmetic number, because the mean of its divisors is an integer number (2938320).

Almost surely, 2^20380493 is an apocalyptic number.

It is an amenable number.

20380493 is a deficient number, since it is larger than the sum of its proper divisors (3126067).

20380493 is a wasteful number, since it uses less digits than its factorization.

20380493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26827.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20380493 is about 4514.4759385780. The cubic root of 20380493 is about 273.1523209949.

Adding to 20380493 its reverse (39408302), we get a palindrome (59788795).

The spelling of 20380493 in words is "twenty million, three hundred eighty thousand, four hundred ninety-three".