20703434 has 4 divisors (see below), whose sum is σ = 31055154. Its totient is φ = 10351716.

The previous prime is 20703421. The next prime is 20703439. The reversal of 20703434 is 43430702.

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 + 874225 = 4453^2 + 935^2 .

It is not an unprimeable number, because it can be changed into a prime (20703439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5175857 + ... + 5175860.

Almost surely, 2^20703434 is an apocalyptic number.

20703434 is a deficient number, since it is larger than the sum of its proper divisors (10351720).

20703434 is a wasteful number, since it uses less digits than its factorization.

20703434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351719.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 20703434 is about 4550.1026362050. The cubic root of 20703434 is about 274.5875204637.

The spelling of 20703434 in words is "twenty million, seven hundred three thousand, four hundred thirty-four".