20641552 has 20 divisors (see below), whose sum is σ = 40072336. Its totient is φ = 10300320.

The previous prime is 20641541. The next prime is 20641559. The reversal of 20641552 is 25514602.

It is not an unprimeable number, because it can be changed into a prime (20641559) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10123 + ... + 11989.

Almost surely, 2^20641552 is an apocalyptic number.

It is an amenable number.

20641552 is a deficient number, since it is larger than the sum of its proper divisors (19430784).

20641552 is a wasteful number, since it uses less digits than its factorization.

20641552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20641552 is about 4543.2974809053. The cubic root of 20641552 is about 274.3136692324.

The spelling of 20641552 in words is "twenty million, six hundred forty-one thousand, five hundred fifty-two".