20393830 has 8 divisors (see below), whose sum is σ = 36708912. Its totient is φ = 8157528.

The previous prime is 20393797. The next prime is 20393839. The reversal of 20393830 is 3839302.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20393839) 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, 1019682 + ... + 1019701.

It is an arithmetic number, because the mean of its divisors is an integer number (4588614).

Almost surely, 2^20393830 is an apocalyptic number.

20393830 is a deficient number, since it is larger than the sum of its proper divisors (16315082).

20393830 is a wasteful number, since it uses less digits than its factorization.

20393830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039390.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20393830 is about 4515.9528341204. The cubic root of 20393830 is about 273.2118916528.

The spelling of 20393830 in words is "twenty million, three hundred ninety-three thousand, eight hundred thirty".