21370699 has 8 divisors (see below), whose sum is σ = 24992000. Its totient is φ = 17891496.

The previous prime is 21370693. The next prime is 21370721. The reversal of 21370699 is 99607312.

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

It is not a de Polignac number, because 21370699 - 2⁵ = 21370667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21370693) 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, 35199 + ... + 35800.

It is an arithmetic number, because the mean of its divisors is an integer number (3124000).

Almost surely, 2^21370699 is an apocalyptic number.

21370699 is a deficient number, since it is larger than the sum of its proper divisors (3621301).

21370699 is an equidigital number, since it uses as much as digits as its factorization.

21370699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71049.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 21370699 is about 4622.8453359376. The cubic root of 21370699 is about 277.5063397085.

The spelling of 21370699 in words is "twenty-one million, three hundred seventy thousand, six hundred ninety-nine".