20344337787 has 16 divisors (see below), whose sum is σ = 27514075680. Its totient is φ = 13369920000.

The previous prime is 20344337773. The next prime is 20344337813. The reversal of 20344337787 is 78773344302.

It is not a de Polignac number, because 20344337787 - 2⁷ = 20344337659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20344337887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77214 + ... + 215987.

It is an arithmetic number, because the mean of its divisors is an integer number (1719629730).

Almost surely, 2^20344337787 is an apocalyptic number.

20344337787 is a deficient number, since it is larger than the sum of its proper divisors (7169737893).

20344337787 is a wasteful number, since it uses less digits than its factorization.

20344337787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293534.

The product of its (nonzero) digits is 2370816, while the sum is 48.

The spelling of 20344337787 in words is "twenty billion, three hundred forty-four million, three hundred thirty-seven thousand, seven hundred eighty-seven".