21458348 has 12 divisors (see below), whose sum is σ = 37584960. Its totient is φ = 10719792.

The previous prime is 21458329. The next prime is 21458351. The reversal of 21458348 is 84385412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6533 + ... + 9251.

It is an arithmetic number, because the mean of its divisors is an integer number (3132080).

Almost surely, 2^21458348 is an apocalyptic number.

It is an amenable number.

21458348 is a deficient number, since it is larger than the sum of its proper divisors (16126612).

21458348 is a wasteful number, since it uses less digits than its factorization.

21458348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696 (or 4694 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 21458348 is about 4632.3156196442. The cubic root of 21458348 is about 277.8852069921.

The spelling of 21458348 in words is "twenty-one million, four hundred fifty-eight thousand, three hundred forty-eight".