21852193 has 8 divisors (see below), whose sum is σ = 23940576. Its totient is φ = 19780800.

The previous prime is 21852169. The next prime is 21852197. The reversal of 21852193 is 39125812.

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 21852193 - 2¹³ = 21844001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21852197) 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, 1471 + ... + 6772.

It is an arithmetic number, because the mean of its divisors is an integer number (2992572).

Almost surely, 2^21852193 is an apocalyptic number.

It is an amenable number.

21852193 is a deficient number, since it is larger than the sum of its proper divisors (2088383).

21852193 is a wasteful number, since it uses less digits than its factorization.

21852193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8495.

The product of its digits is 4320, while the sum is 31.

The square root of 21852193 is about 4674.6329267655. The cubic root of 21852193 is about 279.5750057648.

The spelling of 21852193 in words is "twenty-one million, eight hundred fifty-two thousand, one hundred ninety-three".