20111201984 has 28 divisors (see below), whose sum is σ = 39914727384. Its totient is φ = 10053947904.

The previous prime is 20111201969. The next prime is 20111202049. The reversal of 20111201984 is 48910211102.

It is a super-3 number, since 3×20111201984³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428444 + ... + 473060.

It is an arithmetic number, because the mean of its divisors is an integer number (1425525978).

Almost surely, 2^20111201984 is an apocalyptic number.

It is an amenable number.

20111201984 is a deficient number, since it is larger than the sum of its proper divisors (19803525400).

20111201984 is an equidigital number, since it uses as much as digits as its factorization.

20111201984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51672 (or 51662 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 20111201984 in words is "twenty billion, one hundred eleven million, two hundred one thousand, nine hundred eighty-four".