20553535 has 24 divisors (see below), whose sum is σ = 26609040. Its totient is φ = 15234048.

The previous prime is 20553529. The next prime is 20553557. The reversal of 20553535 is 53535502.

It is not a de Polignac number, because 20553535 - 2⁵ = 20553503 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106399 + ... + 106591.

It is an arithmetic number, because the mean of its divisors is an integer number (1108710).

Almost surely, 2^20553535 is an apocalyptic number.

20553535 is a deficient number, since it is larger than the sum of its proper divisors (6055505).

20553535 is a wasteful number, since it uses less digits than its factorization.

20553535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 28.

The square root of 20553535 is about 4533.6006661372. The cubic root of 20553535 is about 273.9232162704.

The spelling of 20553535 in words is "twenty million, five hundred fifty-three thousand, five hundred thirty-five".