21874395 has 8 divisors (see below), whose sum is σ = 34999056. Its totient is φ = 11666336.

The previous prime is 21874367. The next prime is 21874397. The reversal of 21874395 is 59347812.

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 21874395 - 2⁷ = 21874267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21874397) 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, 729132 + ... + 729161.

It is an arithmetic number, because the mean of its divisors is an integer number (4374882).

Almost surely, 2^21874395 is an apocalyptic number.

21874395 is a deficient number, since it is larger than the sum of its proper divisors (13124661).

21874395 is a wasteful number, since it uses less digits than its factorization.

21874395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458301.

The product of its digits is 60480, while the sum is 39.

The square root of 21874395 is about 4677.0070557997. The cubic root of 21874395 is about 279.6696571849.

The spelling of 21874395 in words is "twenty-one million, eight hundred seventy-four thousand, three hundred ninety-five".