21367948 has 12 divisors (see below), whose sum is σ = 42735952. Its totient is φ = 9157680.

The previous prime is 21367933. The next prime is 21367979. The reversal of 21367948 is 84976312.

21367948 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21367948.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381543 + ... + 381598.

Almost surely, 2^21367948 is an apocalyptic number.

21367948 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21367948 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21367948 is a wasteful number, since it uses less digits than its factorization.

21367948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763152 (or 763150 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 21367948 is about 4622.5477823382. The cubic root of 21367948 is about 277.4944316173.

The spelling of 21367948 in words is "twenty-one million, three hundred sixty-seven thousand, nine hundred forty-eight".