21379095 has 12 divisors (see below), whose sum is σ = 37057176. Its totient is φ = 11402160.

The previous prime is 21379093. The next prime is 21379103. The reversal of 21379095 is 59097312.

It is not a de Polignac number, because 21379095 - 2¹ = 21379093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21379093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237501 + ... + 237590.

It is an arithmetic number, because the mean of its divisors is an integer number (3088098).

Almost surely, 2^21379095 is an apocalyptic number.

21379095 is a deficient number, since it is larger than the sum of its proper divisors (15678081).

21379095 is a wasteful number, since it uses less digits than its factorization.

21379095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475102 (or 475099 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 21379095 is about 4623.7533454976. The cubic root of 21379095 is about 277.5426766602.

The spelling of 21379095 in words is "twenty-one million, three hundred seventy-nine thousand, ninety-five".