21183066 has 16 divisors (see below), whose sum is σ = 47073600. Its totient is φ = 7061004.

The previous prime is 21183059. The next prime is 21183073. The reversal of 21183066 is 66038112.

It is an interprime number because it is at equal distance from previous prime (21183059) and next prime (21183073).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196086 + ... + 196193.

It is an arithmetic number, because the mean of its divisors is an integer number (2942100).

Almost surely, 2^21183066 is an apocalyptic number.

21183066 is an abundant number, since it is smaller than the sum of its proper divisors (25890534).

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

21183066 is a wasteful number, since it uses less digits than its factorization.

21183066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392290 (or 392284 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21183066 is about 4602.5064910329. The cubic root of 21183066 is about 276.6917901090.

It can be divided in two parts, 2118 and 3066, that added together give a square (5184 = 72²).

The spelling of 21183066 in words is "twenty-one million, one hundred eighty-three thousand, sixty-six".