21036701 has 8 divisors (see below), whose sum is σ = 25456320. Its totient is φ = 16970688.

The previous prime is 21036689. The next prime is 21036709. The reversal of 21036701 is 10763012.

It is a happy number.

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

It is not a de Polignac number, because 21036701 - 2⁶ = 21036637 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88271 + ... + 88508.

It is an arithmetic number, because the mean of its divisors is an integer number (3182040).

Almost surely, 2^21036701 is an apocalyptic number.

It is an amenable number.

21036701 is a deficient number, since it is larger than the sum of its proper divisors (4419619).

21036701 is a wasteful number, since it uses less digits than its factorization.

21036701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176803.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 21036701 is about 4586.5783542855. The cubic root of 21036701 is about 276.0530467597.

Adding to 21036701 its reverse (10763012), we get a palindrome (31799713).

The spelling of 21036701 in words is "twenty-one million, thirty-six thousand, seven hundred one".