21383167 has 16 divisors (see below), whose sum is σ = 23869440. Its totient is φ = 19030752.

The previous prime is 21383143. The next prime is 21383177. The reversal of 21383167 is 76138312.

It is not a de Polignac number, because 21383167 - 2¹⁹ = 20858879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21383107) 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, 48048 + ... + 48490.

It is an arithmetic number, because the mean of its divisors is an integer number (1491840).

Almost surely, 2^21383167 is an apocalyptic number.

21383167 is a deficient number, since it is larger than the sum of its proper divisors (2486273).

21383167 is a wasteful number, since it uses less digits than its factorization.

21383167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582.

The product of its digits is 6048, while the sum is 31.

The square root of 21383167 is about 4624.1936594394. The cubic root of 21383167 is about 277.5602963963.

The spelling of 21383167 in words is "twenty-one million, three hundred eighty-three thousand, one hundred sixty-seven".