20380434 has 8 divisors (see below), whose sum is σ = 40760880. Its totient is φ = 6793476.

The previous prime is 20380427. The next prime is 20380439. The reversal of 20380434 is 43408302.

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

20380434 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20380439) 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, 1698364 + ... + 1698375.

It is an arithmetic number, because the mean of its divisors is an integer number (5095110).

Almost surely, 2^20380434 is an apocalyptic number.

20380434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20380434 is a wasteful number, since it uses less digits than its factorization.

20380434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396744.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20380434 is about 4514.4694040385. The cubic root of 20380434 is about 273.1520574095.

Adding to 20380434 its reverse (43408302), we get a palindrome (63788736).

The spelling of 20380434 in words is "twenty million, three hundred eighty thousand, four hundred thirty-four".