21852794 has 4 divisors (see below), whose sum is σ = 32779194. Its totient is φ = 10926396.

The previous prime is 21852773. The next prime is 21852797. The reversal of 21852794 is 49725812.

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

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 3900625 = 4237^2 + 1975^2 .

It is not an unprimeable number, because it can be changed into a prime (21852797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5463197 + ... + 5463200.

Almost surely, 2^21852794 is an apocalyptic number.

21852794 is a deficient number, since it is larger than the sum of its proper divisors (10926400).

21852794 is a wasteful number, since it uses less digits than its factorization.

21852794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10926399.

The product of its digits is 40320, while the sum is 38.

The square root of 21852794 is about 4674.6972094458. The cubic root of 21852794 is about 279.5775687881.

The spelling of 21852794 in words is "twenty-one million, eight hundred fifty-two thousand, seven hundred ninety-four".