20019366881 has 12 divisors (see below), whose sum is σ = 20535403200. Its totient is φ = 19516006560.

The previous prime is 20019366869. The next prime is 20019366893. The reversal of 20019366881 is 18866391002.

It is an interprime number because it is at equal distance from previous prime (20019366869) and next prime (20019366893).

It is not a de Polignac number, because 20019366881 - 2²² = 20015172577 is a prime.

It is a super-2 number, since 2×20019366881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20019366811) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2616860 + ... + 2624498.

It is an arithmetic number, because the mean of its divisors is an integer number (1711283600).

Almost surely, 2^20019366881 is an apocalyptic number.

It is an amenable number.

20019366881 is a deficient number, since it is larger than the sum of its proper divisors (516036319).

20019366881 is an equidigital number, since it uses as much as digits as its factorization.

20019366881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280 (or 9239 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 20019366881 in words is "twenty billion, nineteen million, three hundred sixty-six thousand, eight hundred eighty-one".