21290162 has 8 divisors (see below), whose sum is σ = 32126976. Its totient is φ = 10581172.

The previous prime is 21290161. The next prime is 21290167. The reversal of 21290162 is 26109212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21290161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31538 + ... + 32205.

It is an arithmetic number, because the mean of its divisors is an integer number (4015872).

Almost surely, 2^21290162 is an apocalyptic number.

21290162 is a deficient number, since it is larger than the sum of its proper divisors (10836814).

21290162 is a wasteful number, since it uses less digits than its factorization.

21290162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63912.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 21290162 is about 4614.1263528430. The cubic root of 21290162 is about 277.1573000839.

Adding to 21290162 its reverse (26109212), we get a palindrome (47399374).

The spelling of 21290162 in words is "twenty-one million, two hundred ninety thousand, one hundred sixty-two".