21461848 has 8 divisors (see below), whose sum is σ = 40240980. Its totient is φ = 10730920.

The previous prime is 21461833. The next prime is 21461893. The reversal of 21461848 is 84816412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21461848² = 921221839150208, 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 as a sum of consecutive naturals, namely, 1341358 + ... + 1341373.

Almost surely, 2^21461848 is an apocalyptic number.

It is an amenable number.

21461848 is a deficient number, since it is larger than the sum of its proper divisors (18779132).

21461848 is a wasteful number, since it uses less digits than its factorization.

21461848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682737 (or 2682733 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 21461848 is about 4632.6933850623. The cubic root of 21461848 is about 277.9003144824.

The spelling of 21461848 in words is "twenty-one million, four hundred sixty-one thousand, eight hundred forty-eight".