20313434 has 4 divisors (see below), whose sum is σ = 30470154. Its totient is φ = 10156716.

The previous prime is 20313421. The next prime is 20313437. The reversal of 20313434 is 43431302.

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

It can be written as a sum of positive squares in only one way, i.e., 15626209 + 4687225 = 3953^2 + 2165^2 .

It is not an unprimeable number, because it can be changed into a prime (20313437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078357 + ... + 5078360.

Almost surely, 2^20313434 is an apocalyptic number.

20313434 is a deficient number, since it is larger than the sum of its proper divisors (10156720).

20313434 is a wasteful number, since it uses less digits than its factorization.

20313434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10156719.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20313434 is about 4507.0427111355. The cubic root of 20313434 is about 272.8524026948.

Adding to 20313434 its reverse (43431302), we get a palindrome (63744736).

The spelling of 20313434 in words is "twenty million, three hundred thirteen thousand, four hundred thirty-four".