20612434 has 4 divisors (see below), whose sum is σ = 30918654. Its totient is φ = 10306216.

The previous prime is 20612429. The next prime is 20612447. The reversal of 20612434 is 43421602.

It is a happy number.

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., 19829209 + 783225 = 4453^2 + 885^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5153107 + ... + 5153110.

Almost surely, 2^20612434 is an apocalyptic number.

20612434 is a deficient number, since it is larger than the sum of its proper divisors (10306220).

20612434 is a wasteful number, since it uses less digits than its factorization.

20612434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10306219.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20612434 is about 4540.0918492912. The cubic root of 20612434 is about 274.1846216976.

The spelling of 20612434 in words is "twenty million, six hundred twelve thousand, four hundred thirty-four".