21995349 has 8 divisors (see below), whose sum is σ = 29351712. Its totient is φ = 14651280.

The previous prime is 21995339. The next prime is 21995359. The reversal of 21995349 is 94359912.

It is an interprime number because it is at equal distance from previous prime (21995339) and next prime (21995359).

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

It is not a de Polignac number, because 21995349 - 2¹³ = 21987157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21995349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21995339) 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, 2602 + ... + 7124.

It is an arithmetic number, because the mean of its divisors is an integer number (3668964).

Almost surely, 2^21995349 is an apocalyptic number.

It is an amenable number.

21995349 is a deficient number, since it is larger than the sum of its proper divisors (7356363).

21995349 is a wasteful number, since it uses less digits than its factorization.

21995349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6147.

The product of its digits is 87480, while the sum is 42.

The square root of 21995349 is about 4689.9199353507. The cubic root of 21995349 is about 280.1841857876.

The spelling of 21995349 in words is "twenty-one million, nine hundred ninety-five thousand, three hundred forty-nine".