21860148 has 12 divisors (see below), whose sum is σ = 51007040. Its totient is φ = 7286712.

The previous prime is 21860117. The next prime is 21860183. The reversal of 21860148 is 84106812.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910828 + ... + 910851.

Almost surely, 2^21860148 is an apocalyptic number.

It is an amenable number.

21860148 is an abundant number, since it is smaller than the sum of its proper divisors (29146892).

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

21860148 is a wasteful number, since it uses less digits than its factorization.

21860148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821686 (or 1821684 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 21860148 is about 4675.4837182905. The cubic root of 21860148 is about 279.6089268355.

The spelling of 21860148 in words is "twenty-one million, eight hundred sixty thousand, one hundred forty-eight".