21849086 has 16 divisors (see below), whose sum is σ = 37908864. Its totient is φ = 9250584.

The previous prime is 21849083. The next prime is 21849089. The reversal of 21849086 is 68094812.

It is an interprime number because it is at equal distance from previous prime (21849083) and next prime (21849089).

It is a super-3 number, since 3×21849086³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21849083) 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, 8240 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (2369304).

Almost surely, 2^21849086 is an apocalyptic number.

21849086 is a deficient number, since it is larger than the sum of its proper divisors (16059778).

21849086 is a wasteful number, since it uses less digits than its factorization.

21849086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18895.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 21849086 is about 4674.3005893930. The cubic root of 21849086 is about 279.5617549099.

The spelling of 21849086 in words is "twenty-one million, eight hundred forty-nine thousand, eighty-six".