20553650 has 48 divisors (see below), whose sum is σ = 41705664. Its totient is φ = 7490880.

The previous prime is 20553647. The next prime is 20553691. The reversal of 20553650 is 5635502.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66797 + ... + 67103.

It is an arithmetic number, because the mean of its divisors is an integer number (868868).

Almost surely, 2^20553650 is an apocalyptic number.

20553650 is an abundant number, since it is smaller than the sum of its proper divisors (21152014).

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

20553650 is a wasteful number, since it uses less digits than its factorization.

20553650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 20553650 is about 4533.6133491951. The cubic root of 20553650 is about 273.9237271495.

The spelling of 20553650 in words is "twenty million, five hundred fifty-three thousand, six hundred fifty".