21601148 has 6 divisors (see below), whose sum is σ = 37802016. Its totient is φ = 10800572.

The previous prime is 21601121. The next prime is 21601171. The reversal of 21601148 is 84110612.

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, 2700140 + ... + 2700147.

It is an arithmetic number, because the mean of its divisors is an integer number (6300336).

Almost surely, 2^21601148 is an apocalyptic number.

It is an amenable number.

21601148 is a deficient number, since it is larger than the sum of its proper divisors (16200868).

21601148 is a wasteful number, since it uses less digits than its factorization.

21601148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400291 (or 5400289 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 21601148 is about 4647.7035189435. The cubic root of 21601148 is about 278.5002637664.

The spelling of 21601148 in words is "twenty-one million, six hundred one thousand, one hundred forty-eight".