20653850 has 24 divisors (see below), whose sum is σ = 43904928. Its totient is φ = 7081200.

The previous prime is 20653849. The next prime is 20653877. The reversal of 20653850 is 5835602.

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 11 ways as a sum of consecutive naturals, for example, 29156 + ... + 29855.

It is an arithmetic number, because the mean of its divisors is an integer number (1829372).

Almost surely, 2^20653850 is an apocalyptic number.

20653850 is an abundant number, since it is smaller than the sum of its proper divisors (23251078).

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

20653850 is a wasteful number, since it uses less digits than its factorization.

20653850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59030 (or 59025 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20653850 is about 4544.6507016491. The cubic root of 20653850 is about 274.3681360632.

The spelling of 20653850 in words is "twenty million, six hundred fifty-three thousand, eight hundred fifty".