21480118 has 8 divisors (see below), whose sum is σ = 35149320. Its totient is φ = 9763680.

The previous prime is 21480101. The next prime is 21480131. The reversal of 21480118 is 81108412.

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

It is a super-2 number, since 2×21480118² = 922790938587848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21480092 and 21480101.

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 3 ways as a sum of consecutive naturals, for example, 488163 + ... + 488206.

It is an arithmetic number, because the mean of its divisors is an integer number (4393665).

Almost surely, 2^21480118 is an apocalyptic number.

21480118 is a deficient number, since it is larger than the sum of its proper divisors (13669202).

21480118 is a wasteful number, since it uses less digits than its factorization.

21480118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976382.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 21480118 is about 4634.6648206747. The cubic root of 21480118 is about 277.9791489287.

The spelling of 21480118 in words is "twenty-one million, four hundred eighty thousand, one hundred eighteen".