20185611530 has 128 divisors (see below), whose sum is σ = 43794432000. Its totient is φ = 6553048320.

The previous prime is 20185611527. The next prime is 20185611557. The reversal of 20185611530 is 3511658102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30630341 + ... + 30630999.

It is an arithmetic number, because the mean of its divisors is an integer number (342144000).

Almost surely, 2^20185611530 is an apocalyptic number.

20185611530 is an abundant number, since it is smaller than the sum of its proper divisors (23608820470).

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

20185611530 is a wasteful number, since it uses less digits than its factorization.

20185611530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 20185611530 in words is "twenty billion, one hundred eighty-five million, six hundred eleven thousand, five hundred thirty".