21050152 has 32 divisors (see below), whose sum is σ = 41446080. Its totient is φ = 10003840.

The previous prime is 21050149. The next prime is 21050171. The reversal of 21050152 is 25105012.

It is a super-3 number, since 3×21050152³ (a number of 23 digits) contains 333 as substring.

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, 42627 + ... + 43117.

It is an arithmetic number, because the mean of its divisors is an integer number (1295190).

Almost surely, 2^21050152 is an apocalyptic number.

It is an amenable number.

21050152 is a deficient number, since it is larger than the sum of its proper divisors (20395928).

21050152 is a wasteful number, since it uses less digits than its factorization.

21050152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 21050152 is about 4588.0444636032. The cubic root of 21050152 is about 276.1118709134. Note that the first 3 decimals are identical.

Adding to 21050152 its reverse (25105012), we get a palindrome (46155164).

The spelling of 21050152 in words is "twenty-one million, fifty thousand, one hundred fifty-two".