20111044403987 has 8 divisors (see below), whose sum is σ = 20148309189456. Its totient is φ = 20073781439712.

The previous prime is 20111044403971. The next prime is 20111044403999. The reversal of 20111044403987 is 78930444011102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111044403987 - 2⁴ = 20111044403971 is a prime.

It is a super-2 number, since 2×20111044403987² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111044403927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22744193 + ... + 23611869.

It is an arithmetic number, because the mean of its divisors is an integer number (2518538648682).

Almost surely, 2^{20111044403987} is an apocalyptic number.

20111044403987 is a deficient number, since it is larger than the sum of its proper divisors (37264785469).

20111044403987 is an equidigital number, since it uses as much as digits as its factorization.

20111044403987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910597.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 20111044403987 in words is "twenty trillion, one hundred eleven billion, forty-four million, four hundred three thousand, nine hundred eighty-seven".