21461652 has 24 divisors (see below), whose sum is σ = 55641600. Its totient is φ = 7153848.

The previous prime is 21461647. The next prime is 21461669. The reversal of 21461652 is 25616412.

21461652 is a `hidden beast` number, since 2 + 1 + 4 + 6 + 1 + 652 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99252 + ... + 99467.

It is an arithmetic number, because the mean of its divisors is an integer number (2318400).

Almost surely, 2^21461652 is an apocalyptic number.

It is an amenable number.

21461652 is an abundant number, since it is smaller than the sum of its proper divisors (34179948).

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

21461652 is a wasteful number, since it uses less digits than its factorization.

21461652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198732 (or 198724 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 21461652 is about 4632.6722310131. The cubic root of 21461652 is about 277.8994685063.

The spelling of 21461652 in words is "twenty-one million, four hundred sixty-one thousand, six hundred fifty-two".