21383082 has 32 divisors (see below), whose sum is σ = 54307200. Its totient is φ = 6109344.

The previous prime is 21383081. The next prime is 21383101. The reversal of 21383082 is 28038312.

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

It is not an unprimeable number, because it can be changed into a prime (21383081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27907 + ... + 28662.

It is an arithmetic number, because the mean of its divisors is an integer number (1697100).

Almost surely, 2^21383082 is an apocalyptic number.

21383082 is an abundant number, since it is smaller than the sum of its proper divisors (32924118).

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

21383082 is a wasteful number, since it uses less digits than its factorization.

21383082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56587 (or 56581 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 21383082 is about 4624.1844686388. The cubic root of 21383082 is about 277.5599286201.

The spelling of 21383082 in words is "twenty-one million, three hundred eighty-three thousand, eighty-two".