21852711 has 6 divisors (see below), whose sum is σ = 31565040. Its totient is φ = 14568468.

The previous prime is 21852683. The next prime is 21852749. The reversal of 21852711 is 11725812.

It is not a de Polignac number, because 21852711 - 2¹⁵ = 21819943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21852751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1214031 + ... + 1214048.

It is an arithmetic number, because the mean of its divisors is an integer number (5260840).

Almost surely, 2^21852711 is an apocalyptic number.

21852711 is a deficient number, since it is larger than the sum of its proper divisors (9712329).

21852711 is a wasteful number, since it uses less digits than its factorization.

21852711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428085 (or 2428082 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 21852711 is about 4674.6883318570. The cubic root of 21852711 is about 279.5772148292.

The spelling of 21852711 in words is "twenty-one million, eight hundred fifty-two thousand, seven hundred eleven".