20735850 has 24 divisors (see below), whose sum is σ = 51425280. Its totient is φ = 5529520.

The previous prime is 20735849. The next prime is 20735887. The reversal of 20735850 is 5853702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68970 + ... + 69269.

It is an arithmetic number, because the mean of its divisors is an integer number (2142720).

Almost surely, 2^20735850 is an apocalyptic number.

20735850 is an abundant number, since it is smaller than the sum of its proper divisors (30689430).

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

20735850 is a wasteful number, since it uses less digits than its factorization.

20735850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138254 (or 138249 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20735850 is about 4553.6633604165. The cubic root of 20735850 is about 274.7307557608.

The spelling of 20735850 in words is "twenty million, seven hundred thirty-five thousand, eight hundred fifty".