21739095 has 36 divisors (see below), whose sum is σ = 43837560. Its totient is φ = 9936864.

The previous prime is 21739049. The next prime is 21739103. The reversal of 21739095 is 59093712.

It is not a de Polignac number, because 21739095 - 2⁶ = 21739031 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2725 + ... + 7134.

It is an arithmetic number, because the mean of its divisors is an integer number (1217710).

Almost surely, 2^21739095 is an apocalyptic number.

21739095 is an abundant number, since it is smaller than the sum of its proper divisors (22098465).

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

21739095 is a wasteful number, since it uses less digits than its factorization.

21739095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9884 (or 9874 counting only the distinct ones).

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

The square root of 21739095 is about 4662.5202412429. The cubic root of 21739095 is about 279.0918493598.

The spelling of 21739095 in words is "twenty-one million, seven hundred thirty-nine thousand, ninety-five".