21059152 has 20 divisors (see below), whose sum is σ = 41472916. Its totient is φ = 10356480.

The previous prime is 21059119. The next prime is 21059161. The reversal of 21059152 is 25195012.

It can be written as a sum of positive squares in 2 ways, for example, as 8271376 + 12787776 = 2876^2 + 3576^2 .

It is a congruent number.

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, 9813 + ... + 11764.

Almost surely, 2^21059152 is an apocalyptic number.

It is an amenable number.

21059152 is a deficient number, since it is larger than the sum of its proper divisors (20413764).

21059152 is a wasteful number, since it uses less digits than its factorization.

21059152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21646 (or 21640 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 21059152 is about 4589.0251688131. The cubic root of 21059152 is about 276.1512158829.

The spelling of 21059152 in words is "twenty-one million, fifty-nine thousand, one hundred fifty-two".