21059148 has 24 divisors (see below), whose sum is σ = 53605440. Its totient is φ = 6381520.

The previous prime is 21059119. The next prime is 21059161. The reversal of 21059148 is 84195012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79638 + ... + 79901.

It is an arithmetic number, because the mean of its divisors is an integer number (2233560).

Almost surely, 2^21059148 is an apocalyptic number.

It is an amenable number.

21059148 is an abundant number, since it is smaller than the sum of its proper divisors (32546292).

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

21059148 is a wasteful number, since it uses less digits than its factorization.

21059148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159557 (or 159555 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 21059148 is about 4589.0247329907. The cubic root of 21059148 is about 276.1511983988.

The spelling of 21059148 in words is "twenty-one million, fifty-nine thousand, one hundred forty-eight".