21448134 has 12 divisors (see below), whose sum is σ = 46470996. Its totient is φ = 7149372.

The previous prime is 21448129. The next prime is 21448153. The reversal of 21448134 is 43184412.

It is a junction number, because it is equal to n+sod(n) for n = 21448098 and 21448107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 595764 + ... + 595799.

It is an arithmetic number, because the mean of its divisors is an integer number (3872583).

Almost surely, 2^21448134 is an apocalyptic number.

21448134 is an abundant number, since it is smaller than the sum of its proper divisors (25022862).

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

21448134 is a wasteful number, since it uses less digits than its factorization.

21448134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191571 (or 1191568 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 21448134 is about 4631.2130160467. The cubic root of 21448134 is about 277.8411096248.

The spelling of 21448134 in words is "twenty-one million, four hundred forty-eight thousand, one hundred thirty-four".