21986701 has 8 divisors (see below), whose sum is σ = 24571008. Its totient is φ = 19500000.

The previous prime is 21986693. The next prime is 21986711. The reversal of 21986701 is 10768912.

It is a happy number.

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 21986701 - 2³ = 21986693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21986711) 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, 23925 + ... + 24826.

It is an arithmetic number, because the mean of its divisors is an integer number (3071376).

Almost surely, 2^21986701 is an apocalyptic number.

It is an amenable number.

21986701 is a deficient number, since it is larger than the sum of its proper divisors (2584307).

21986701 is a wasteful number, since it uses less digits than its factorization.

21986701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48803.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 21986701 is about 4688.9978673486. The cubic root of 21986701 is about 280.1474605923.

The spelling of 21986701 in words is "twenty-one million, nine hundred eighty-six thousand, seven hundred one".