20312434 has 4 divisors (see below), whose sum is σ = 30468654. Its totient is φ = 10156216.

The previous prime is 20312429. The next prime is 20312437. The reversal of 20312434 is 43421302.

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., 11580409 + 8732025 = 3403^2 + 2955^2 .

It is not an unprimeable number, because it can be changed into a prime (20312437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078107 + ... + 5078110.

Almost surely, 2^20312434 is an apocalyptic number.

20312434 is a deficient number, since it is larger than the sum of its proper divisors (10156220).

20312434 is a wasteful number, since it uses less digits than its factorization.

20312434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156219.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20312434 is about 4506.9317722814. The cubic root of 20312434 is about 272.8479252493.

Adding to 20312434 its reverse (43421302), we get a palindrome (63733736).

It can be divided in two parts, 2031 and 2434, that added together give a triangular number (4465 = T₉₄).

The spelling of 20312434 in words is "twenty million, three hundred twelve thousand, four hundred thirty-four".