21346895 has 4 divisors (see below), whose sum is σ = 25616280. Its totient is φ = 17077512.

The previous prime is 21346873. The next prime is 21346903. The reversal of 21346895 is 59864312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21346895 - 2¹² = 21342799 is a prime.

It is a super-2 number, since 2×21346895² = 911379852282050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134685 + ... + 2134694.

It is an arithmetic number, because the mean of its divisors is an integer number (6404070).

Almost surely, 2^21346895 is an apocalyptic number.

21346895 is a deficient number, since it is larger than the sum of its proper divisors (4269385).

21346895 is an equidigital number, since it uses as much as digits as its factorization.

21346895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269384.

The product of its digits is 51840, while the sum is 38.

The square root of 21346895 is about 4620.2700137546. The cubic root of 21346895 is about 277.4032668818.

The spelling of 21346895 in words is "twenty-one million, three hundred forty-six thousand, eight hundred ninety-five".