21942852 has 24 divisors (see below), whose sum is σ = 54212256. Its totient is φ = 6883968.

The previous prime is 21942839. The next prime is 21942871. The reversal of 21942852 is 25824912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53578 + ... + 53985.

It is an arithmetic number, because the mean of its divisors is an integer number (2258844).

Almost surely, 2^21942852 is an apocalyptic number.

It is an amenable number.

21942852 is an abundant number, since it is smaller than the sum of its proper divisors (32269404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21942852 is a wasteful number, since it uses less digits than its factorization.

21942852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107587 (or 107585 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 21942852 is about 4684.3198012091. The cubic root of 21942852 is about 279.9611000381.

It can be divided in two parts, 219 and 42852, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 21942852 in words is "twenty-one million, nine hundred forty-two thousand, eight hundred fifty-two".