21020162 has 8 divisors (see below), whose sum is σ = 31929600. Its totient is φ = 10376964.

The previous prime is 21020161. The next prime is 21020227. The reversal of 21020162 is 26102012.

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 (21020161) 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, 66362 + ... + 66677.

It is an arithmetic number, because the mean of its divisors is an integer number (3991200).

Almost surely, 2^21020162 is an apocalyptic number.

21020162 is a deficient number, since it is larger than the sum of its proper divisors (10909438).

21020162 is a wasteful number, since it uses less digits than its factorization.

21020162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133120.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21020162 is about 4584.7750217432. The cubic root of 21020162 is about 275.9806837283.

Adding to 21020162 its reverse (26102012), we get a palindrome (47122174).

The spelling of 21020162 in words is "twenty-one million, twenty thousand, one hundred sixty-two".