21411068 has 24 divisors (see below), whose sum is σ = 44685312. Its totient is φ = 8776944.

The previous prime is 21411067. The next prime is 21411079. The reversal of 21411068 is 86011412.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15980 + ... + 17267.

It is an arithmetic number, because the mean of its divisors is an integer number (1861888).

Almost surely, 2^21411068 is an apocalyptic number.

21411068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21411068 is an abundant number, since it is smaller than the sum of its proper divisors (23274244).

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

21411068 is a wasteful number, since it uses less digits than its factorization.

21411068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33281 (or 33279 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 21411068 is about 4627.2095262696. The cubic root of 21411068 is about 277.6809652075.

The spelling of 21411068 in words is "twenty-one million, four hundred eleven thousand, sixty-eight".