21942162 has 24 divisors (see below), whose sum is σ = 51863760. Its totient is φ = 6649080.

The previous prime is 21942143. The next prime is 21942191. The reversal of 21942162 is 26124912.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55212 + ... + 55607.

It is an arithmetic number, because the mean of its divisors is an integer number (2160990).

Almost surely, 2^21942162 is an apocalyptic number.

21942162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21942162 is an abundant number, since it is smaller than the sum of its proper divisors (29921598).

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

21942162 is a wasteful number, since it uses less digits than its factorization.

21942162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110838 (or 110835 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 21942162 is about 4684.2461506629. The cubic root of 21942162 is about 279.9581655186.

It can be divided in two parts, 2194 and 2162, that added together give a square (4356 = 66²).

The spelling of 21942162 in words is "twenty-one million, nine hundred forty-two thousand, one hundred sixty-two".