21760148 has 18 divisors (see below), whose sum is σ = 38494218. Its totient is φ = 10762960.

The previous prime is 21760133. The next prime is 21760159. The reversal of 21760148 is 84106712.

It can be written as a sum of positive squares in only one way, i.e., 13454224 + 8305924 = 3668^2 + 2882^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21760148.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68486 + ... + 68802.

Almost surely, 2^21760148 is an apocalyptic number.

It is an amenable number.

21760148 is a deficient number, since it is larger than the sum of its proper divisors (16734070).

21760148 is a wasteful number, since it uses less digits than its factorization.

21760148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 21760148 is about 4664.7773794684. Note that the first 3 decimals coincide. The cubic root of 21760148 is about 279.1819148227.

The spelling of 21760148 in words is "twenty-one million, seven hundred sixty thousand, one hundred forty-eight".