21853027 has 8 divisors (see below), whose sum is σ = 25166592. Its totient is φ = 18587400.

The previous prime is 21853009. The next prime is 21853031. The reversal of 21853027 is 72035812.

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 21853027 - 2⁷ = 21852899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21852986 and 21853004.

It is not an unprimeable number, because it can be changed into a prime (21853057) 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, 10999 + ... + 12832.

It is an arithmetic number, because the mean of its divisors is an integer number (3145824).

Almost surely, 2^21853027 is an apocalyptic number.

21853027 is a deficient number, since it is larger than the sum of its proper divisors (3313565).

21853027 is a wasteful number, since it uses less digits than its factorization.

21853027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23969.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 21853027 is about 4674.7221307795. The cubic root of 21853027 is about 279.5785624267.

Adding to 21853027 its reverse (72035812), we get a palindrome (93888839).

The spelling of 21853027 in words is "twenty-one million, eight hundred fifty-three thousand, twenty-seven".