21163052 has 24 divisors (see below), whose sum is σ = 38833872. Its totient is φ = 10080000.

The previous prime is 21163033. The next prime is 21163057. The reversal of 21163052 is 25036112.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21163057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5552 + ... + 8552.

It is an arithmetic number, because the mean of its divisors is an integer number (1618078).

Almost surely, 2^21163052 is an apocalyptic number.

It is an amenable number.

21163052 is a deficient number, since it is larger than the sum of its proper divisors (17670820).

21163052 is a wasteful number, since it uses less digits than its factorization.

21163052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089 (or 3087 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 21163052 is about 4600.3317271692. The cubic root of 21163052 is about 276.6046221414.

Adding to 21163052 its reverse (25036112), we get a palindrome (46199164).

The spelling of 21163052 in words is "twenty-one million, one hundred sixty-three thousand, fifty-two".