21480995 has 8 divisors (see below), whose sum is σ = 25874640. Its totient is φ = 17119840.

The previous prime is 21480973. The next prime is 21480997. The reversal of 21480995 is 59908412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21480995 - 2⁶ = 21480931 is a prime.

It is a super-2 number, since 2×21480995² = 922866292380050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21480997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6641 + ... + 9330.

It is an arithmetic number, because the mean of its divisors is an integer number (3234330).

Almost surely, 2^21480995 is an apocalyptic number.

21480995 is a deficient number, since it is larger than the sum of its proper divisors (4393645).

21480995 is a wasteful number, since it uses less digits than its factorization.

21480995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16245.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 21480995 is about 4634.7594328077. The cubic root of 21480995 is about 277.9829320301.

The spelling of 21480995 in words is "twenty-one million, four hundred eighty thousand, nine hundred ninety-five".