19860311941 has 4 divisors (see below), whose sum is σ = 19903770412. Its totient is φ = 19816853472.

The previous prime is 19860311923. The next prime is 19860311969. The reversal of 19860311941 is 14911306891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17866332225 + 1993979716 = 133665^2 + 44654^2 .

It is a cyclic number.

It is not a de Polignac number, because 19860311941 - 2⁵ = 19860311909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19860311921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21728550 + ... + 21729463.

It is an arithmetic number, because the mean of its divisors is an integer number (4975942603).

Almost surely, 2^19860311941 is an apocalyptic number.

It is an amenable number.

19860311941 is a deficient number, since it is larger than the sum of its proper divisors (43458471).

19860311941 is an equidigital number, since it uses as much as digits as its factorization.

19860311941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43458470.

The product of its (nonzero) digits is 46656, while the sum is 43.

The spelling of 19860311941 in words is "nineteen billion, eight hundred sixty million, three hundred eleven thousand, nine hundred forty-one".