20185320 has 32 divisors (see below), whose sum is σ = 60556320. Its totient is φ = 5382720.

The previous prime is 20185271. The next prime is 20185331. The reversal of 20185320 is 2358102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83986 + ... + 84225.

It is an arithmetic number, because the mean of its divisors is an integer number (1892385).

Almost surely, 2^20185320 is an apocalyptic number.

20185320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20185320 is an abundant number, since it is smaller than the sum of its proper divisors (40371000).

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

20185320 is a wasteful number, since it uses less digits than its factorization.

20185320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168225 (or 168221 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20185320 is about 4492.8075854637. The cubic root of 20185320 is about 272.2775785123.

The spelling of 20185320 in words is "twenty million, one hundred eighty-five thousand, three hundred twenty".