20440140986 has 64 divisors (see below), whose sum is σ = 34091366400. Its totient is φ = 9148075200.

The previous prime is 20440140979. The next prime is 20440141003. The reversal of 20440140986 is 68904104402.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37781876 + ... + 37782416.

It is an arithmetic number, because the mean of its divisors is an integer number (532677600).

Almost surely, 2^20440140986 is an apocalyptic number.

20440140986 is a deficient number, since it is larger than the sum of its proper divisors (13651225414).

20440140986 is a wasteful number, since it uses less digits than its factorization.

20440140986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035.

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 20440140986 in words is "twenty billion, four hundred forty million, one hundred forty thousand, nine hundred eighty-six".