21383070 has 32 divisors (see below), whose sum is σ = 52047360. Its totient is φ = 5621280.

The previous prime is 21383069. The next prime is 21383071. The reversal of 21383070 is 7038312.

It is an interprime number because it is at equal distance from previous prime (21383069) and next prime (21383071).

It is a self number, because there is not a number n which added to its sum of digits gives 21383070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21383071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2890 + ... + 7149.

It is an arithmetic number, because the mean of its divisors is an integer number (1626480).

Almost surely, 2^21383070 is an apocalyptic number.

21383070 is an abundant number, since it is smaller than the sum of its proper divisors (30664290).

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

21383070 is a wasteful number, since it uses less digits than its factorization.

21383070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10120.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 21383070 is about 4624.1831711125. The cubic root of 21383070 is about 277.5598766987.

The spelling of 21383070 in words is "twenty-one million, three hundred eighty-three thousand, seventy".