21910095 has 28 divisors (see below), whose sum is σ = 39426696. Its totient is φ = 11683440.

The previous prime is 21910081. The next prime is 21910111. The reversal of 21910095 is 59001912.

It is a happy number.

It is not a de Polignac number, because 21910095 - 2¹² = 21905999 is a prime.

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

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 640 + ... + 6650.

Almost surely, 2^21910095 is an apocalyptic number.

21910095 is a deficient number, since it is larger than the sum of its proper divisors (17516601).

21910095 is an frugal number, since it uses more digits than its factorization.

21910095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034 (or 6019 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 21910095 is about 4680.8220431886. The cubic root of 21910095 is about 279.8217189924.

It can be divided in two parts, 21 and 910095, that added together give a square (910116 = 954²).

The spelling of 21910095 in words is "twenty-one million, nine hundred ten thousand, ninety-five".