21060734 has 4 divisors (see below), whose sum is σ = 31591104. Its totient is φ = 10530366.

The previous prime is 21060731. The next prime is 21060751. The reversal of 21060734 is 43706012.

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 (21060731) 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, 5265182 + ... + 5265185.

It is an arithmetic number, because the mean of its divisors is an integer number (7897776).

Almost surely, 2^21060734 is an apocalyptic number.

21060734 is a deficient number, since it is larger than the sum of its proper divisors (10530370).

21060734 is a wasteful number, since it uses less digits than its factorization.

21060734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530369.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21060734 is about 4589.1975333385. The cubic root of 21060734 is about 276.1581306958.

Adding to 21060734 its reverse (43706012), we get a palindrome (64766746).

The spelling of 21060734 in words is "twenty-one million, sixty thousand, seven hundred thirty-four".