21469148 has 6 divisors (see below), whose sum is σ = 37571016. Its totient is φ = 10734572.

The previous prime is 21469121. The next prime is 21469163. The reversal of 21469148 is 84196412.

It is a happy number.

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, 2683640 + ... + 2683647.

It is an arithmetic number, because the mean of its divisors is an integer number (6261836).

Almost surely, 2^21469148 is an apocalyptic number.

It is an amenable number.

21469148 is a deficient number, since it is larger than the sum of its proper divisors (16101868).

21469148 is a wasteful number, since it uses less digits than its factorization.

21469148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367291 (or 5367289 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 21469148 is about 4633.4811966814. The cubic root of 21469148 is about 277.9318191060.

The spelling of 21469148 in words is "twenty-one million, four hundred sixty-nine thousand, one hundred forty-eight".