20608534 has 4 divisors (see below), whose sum is σ = 30912804. Its totient is φ = 10304266.

The previous prime is 20608517. The next prime is 20608537. The reversal of 20608534 is 43580602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20608537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5152132 + ... + 5152135.

It is an arithmetic number, because the mean of its divisors is an integer number (7728201).

Almost surely, 2^20608534 is an apocalyptic number.

20608534 is a deficient number, since it is larger than the sum of its proper divisors (10304270).

20608534 is a wasteful number, since it uses less digits than its factorization.

20608534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10304269.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20608534 is about 4539.6623222438. The cubic root of 20608534 is about 274.1673281314.

The spelling of 20608534 in words is "twenty million, six hundred eight thousand, five hundred thirty-four".