21115702 has 8 divisors (see below), whose sum is σ = 33050736. Its totient is φ = 10098792.

The previous prime is 21115657. The next prime is 21115723. The reversal of 21115702 is 20751112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21115702.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 229473 + ... + 229564.

It is an arithmetic number, because the mean of its divisors is an integer number (4131342).

Almost surely, 2^21115702 is an apocalyptic number.

21115702 is a deficient number, since it is larger than the sum of its proper divisors (11935034).

21115702 is a wasteful number, since it uses less digits than its factorization.

21115702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459062.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 21115702 is about 4595.1824773343. The cubic root of 21115702 is about 276.3981772977.

Adding to 21115702 its reverse (20751112), we get a palindrome (41866814).

The spelling of 21115702 in words is "twenty-one million, one hundred fifteen thousand, seven hundred two".