21162068 has 12 divisors (see below), whose sum is σ = 37937172. Its totient is φ = 10322880.

The previous prime is 21162041. The next prime is 21162107. The reversal of 21162068 is 86026112.

It can be written as a sum of positive squares in 2 ways, for example, as 9314704 + 11847364 = 3052^2 + 3442^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64355 + ... + 64682.

It is an arithmetic number, because the mean of its divisors is an integer number (3161431).

Almost surely, 2^21162068 is an apocalyptic number.

It is an amenable number.

21162068 is a deficient number, since it is larger than the sum of its proper divisors (16775104).

21162068 is a wasteful number, since it uses less digits than its factorization.

21162068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129082 (or 129080 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 21162068 is about 4600.2247771169. The cubic root of 21162068 is about 276.6003350602.

The spelling of 21162068 in words is "twenty-one million, one hundred sixty-two thousand, sixty-eight".