21136701 has 8 divisors (see below), whose sum is σ = 29407680. Its totient is φ = 13478432.

The previous prime is 21136681. The next prime is 21136723. The reversal of 21136701 is 10763112.

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

It is a cyclic number.

It is not a de Polignac number, because 21136701 - 2⁵ = 21136669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21136751) 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 in 7 ways as a sum of consecutive naturals, for example, 153096 + ... + 153233.

It is an arithmetic number, because the mean of its divisors is an integer number (3675960).

Almost surely, 2^21136701 is an apocalyptic number.

It is an amenable number.

21136701 is a deficient number, since it is larger than the sum of its proper divisors (8270979).

21136701 is a wasteful number, since it uses less digits than its factorization.

21136701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306355.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 21136701 is about 4597.4668024903. The cubic root of 21136701 is about 276.4897704698.

Adding to 21136701 its reverse (10763112), we get a palindrome (31899813).

The spelling of 21136701 in words is "twenty-one million, one hundred thirty-six thousand, seven hundred one".