20605034 has 4 divisors (see below), whose sum is σ = 30907554. Its totient is φ = 10302516.

The previous prime is 20605021. The next prime is 20605043. The reversal of 20605034 is 43050602.

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., 20566225 + 38809 = 4535^2 + 197^2 .

It is a super-2 number, since 2×20605034² = 849134852282312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20604997 and 20605015.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5151257 + ... + 5151260.

Almost surely, 2^20605034 is an apocalyptic number.

20605034 is a deficient number, since it is larger than the sum of its proper divisors (10302520).

20605034 is a wasteful number, since it uses less digits than its factorization.

20605034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10302519.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20605034 is about 4539.2768146479. The cubic root of 20605034 is about 274.1518064067.

Adding to 20605034 its reverse (43050602), we get a palindrome (63655636).

The spelling of 20605034 in words is "twenty million, six hundred five thousand, thirty-four".