21050548 has 24 divisors (see below), whose sum is σ = 38553984. Its totient is φ = 10046400.

The previous prime is 21050527. The next prime is 21050567. The reversal of 21050548 is 84505012.

It is a super-2 number, since 2×21050548² = 886251142200608, which contains 22 as substring.

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, 6343 + ... + 9073.

It is an arithmetic number, because the mean of its divisors is an integer number (1606416).

Almost surely, 2^21050548 is an apocalyptic number.

It is an amenable number.

21050548 is a deficient number, since it is larger than the sum of its proper divisors (17503436).

21050548 is a wasteful number, since it uses less digits than its factorization.

21050548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 21050548 is about 4588.0876190413. The cubic root of 21050548 is about 276.1136023279.

The spelling of 21050548 in words is "twenty-one million, fifty thousand, five hundred forty-eight".