20085900 has 144 divisors (see below), whose sum is σ = 62995968. Its totient is φ = 4928000.

The previous prime is 20085899. The next prime is 20085911. The reversal of 20085900 is 958002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 282865 + ... + 282935.

It is an arithmetic number, because the mean of its divisors is an integer number (437472).

Almost surely, 2^20085900 is an apocalyptic number.

20085900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20085900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31497984).

20085900 is an abundant number, since it is smaller than the sum of its proper divisors (42910068).

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

20085900 is a wasteful number, since it uses less digits than its factorization.

20085900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20085900 is about 4481.7295768487. The cubic root of 20085900 is about 271.8298207395.

The spelling of 20085900 in words is "twenty million, eighty-five thousand, nine hundred".