21458106 has 24 divisors (see below), whose sum is σ = 48940320. Its totient is φ = 6776136.

The previous prime is 21458089. The next prime is 21458111. The reversal of 21458106 is 60185412.

It is a self number, because there is not a number n which added to its sum of digits gives 21458106.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31030 + ... + 31713.

It is an arithmetic number, because the mean of its divisors is an integer number (2039180).

Almost surely, 2^21458106 is an apocalyptic number.

21458106 is an abundant number, since it is smaller than the sum of its proper divisors (27482214).

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

21458106 is a wasteful number, since it uses less digits than its factorization.

21458106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62770 (or 62767 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 21458106 is about 4632.2894987252. The cubic root of 21458106 is about 277.8841623563.

The spelling of 21458106 in words is "twenty-one million, four hundred fifty-eight thousand, one hundred six".