21113702 has 4 divisors (see below), whose sum is σ = 31670556. Its totient is φ = 10556850.

The previous prime is 21113689. The next prime is 21113707. The reversal of 21113702 is 20731112.

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 (21113707) by changing a digit.

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, 5278424 + ... + 5278427.

It is an arithmetic number, because the mean of its divisors is an integer number (7917639).

Almost surely, 2^21113702 is an apocalyptic number.

21113702 is a deficient number, since it is larger than the sum of its proper divisors (10556854).

21113702 is a wasteful number, since it uses less digits than its factorization.

21113702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556853.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 21113702 is about 4594.9648529668. The cubic root of 21113702 is about 276.3894505563.

Adding to 21113702 its reverse (20731112), we get a palindrome (41844814).

The spelling of 21113702 in words is "twenty-one million, one hundred thirteen thousand, seven hundred two".