20311531086 has 64 divisors (see below), whose sum is σ = 51257235456. Its totient is φ = 5212149600.

The previous prime is 20311531061. The next prime is 20311531103. The reversal of 20311531086 is 68013511302.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 226500 + ... + 303191.

It is an arithmetic number, because the mean of its divisors is an integer number (800894304).

Almost surely, 2^20311531086 is an apocalyptic number.

20311531086 is an abundant number, since it is smaller than the sum of its proper divisors (30945704370).

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

20311531086 is a wasteful number, since it uses less digits than its factorization.

20311531086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529797.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 20311531086 in words is "twenty billion, three hundred eleven million, five hundred thirty-one thousand, eighty-six".