21871096 has 16 divisors (see below), whose sum is σ = 44163000. Its totient is φ = 10094304.

The previous prime is 21871067. The next prime is 21871097. The reversal of 21871096 is 69017812.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21871097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105046 + ... + 105253.

Almost surely, 2^21871096 is an apocalyptic number.

21871096 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21871096 is an abundant number, since it is smaller than the sum of its proper divisors (22291904).

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

21871096 is a wasteful number, since it uses less digits than its factorization.

21871096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210318 (or 210314 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 21871096 is about 4676.6543596892. The cubic root of 21871096 is about 279.6555969624.

The spelling of 21871096 in words is "twenty-one million, eight hundred seventy-one thousand, ninety-six".