21048188 has 24 divisors (see below), whose sum is σ = 42209664. Its totient is φ = 8996400.

The previous prime is 21048173. The next prime is 21048221. The reversal of 21048188 is 88184012.

It is a congruent 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, 12983 + ... + 14513.

It is an arithmetic number, because the mean of its divisors is an integer number (1758736).

Almost surely, 2^21048188 is an apocalyptic number.

21048188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21048188 is an abundant number, since it is smaller than the sum of its proper divisors (21161476).

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

21048188 is a wasteful number, since it uses less digits than its factorization.

21048188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033 (or 2031 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 21048188 is about 4587.8304240676. The cubic root of 21048188 is about 276.1032834761.

The spelling of 21048188 in words is "twenty-one million, forty-eight thousand, one hundred eighty-eight".