21994362 has 128 divisors (see below), whose sum is σ = 59270400. Its totient is φ = 5971968.

The previous prime is 21994333. The next prime is 21994363. The reversal of 21994362 is 26349912.

21994362 is a `hidden beast` number, since 219 + 9 + 436 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (21994363) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 226698 + ... + 226794.

It is an arithmetic number, because the mean of its divisors is an integer number (463050).

Almost surely, 2^21994362 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21994362, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29635200).

21994362 is an abundant number, since it is smaller than the sum of its proper divisors (37276038).

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

21994362 is a wasteful number, since it uses less digits than its factorization.

21994362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 21994362 is about 4689.8147084933. The cubic root of 21994362 is about 280.1799948118.

It can be divided in two parts, 2199 and 4362, that added together give a 8-th power (6561 = 3⁸).

The spelling of 21994362 in words is "twenty-one million, nine hundred ninety-four thousand, three hundred sixty-two".