21195080 has 32 divisors (see below), whose sum is σ = 48981240. Its totient is φ = 8248320.

The previous prime is 21195077. The next prime is 21195091. The reversal of 21195080 is 8059112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14915044 + 6280036 = 3862^2 + 2506^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5681 + ... + 8640.

Almost surely, 2^21195080 is an apocalyptic number.

21195080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21195080 is an abundant number, since it is smaller than the sum of its proper divisors (27786160).

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

21195080 is a wasteful number, since it uses less digits than its factorization.

21195080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14369 (or 14365 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 21195080 is about 4603.8114644281. The cubic root of 21195080 is about 276.7440889110.

The spelling of 21195080 in words is "twenty-one million, one hundred ninety-five thousand, eighty".