21534118 has 8 divisors (see below), whose sum is σ = 33705648. Its totient is φ = 10298904.

The previous prime is 21534089. The next prime is 21534151. The reversal of 21534118 is 81143512.

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

It is a junction number, because it is equal to n+sod(n) for n = 21534092 and 21534101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234021 + ... + 234112.

It is an arithmetic number, because the mean of its divisors is an integer number (4213206).

Almost surely, 2^21534118 is an apocalyptic number.

21534118 is a deficient number, since it is larger than the sum of its proper divisors (12171530).

21534118 is a wasteful number, since it uses less digits than its factorization.

21534118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468158.

The product of its digits is 960, while the sum is 25.

The square root of 21534118 is about 4640.4868279093. The cubic root of 21534118 is about 278.2118961402.

The spelling of 21534118 in words is "twenty-one million, five hundred thirty-four thousand, one hundred eighteen".