21652058 has 12 divisors (see below), whose sum is σ = 34278570. Its totient is φ = 10255896.

The previous prime is 21652003. The next prime is 21652061. The reversal of 21652058 is 85025612.

It can be written as a sum of positive squares in only one way, i.e., 14876449 + 6775609 = 3857^2 + 2603^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21652058.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14273 + ... + 15716.

Almost surely, 2^21652058 is an apocalyptic number.

21652058 is a deficient number, since it is larger than the sum of its proper divisors (12626512).

21652058 is a wasteful number, since it uses less digits than its factorization.

21652058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30029 (or 30010 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 21652058 is about 4653.1771941331. The cubic root of 21652058 is about 278.7188836951.

The spelling of 21652058 in words is "twenty-one million, six hundred fifty-two thousand, fifty-eight".