20201001984 has 66 divisors (see below), whose sum is σ = 58329981450. Its totient is φ = 6733664256.

The previous prime is 20201001983. The next prime is 20201002013. The reversal of 20201001984 is 48910010202.

It can be written as a sum of positive squares in only one way, i.e., 10650240000 + 9550761984 = 103200^2 + 97728^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201001983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1086759 + ... + 1105190.

Almost surely, 2^20201001984 is an apocalyptic number.

20201001984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20201001984 is an abundant number, since it is smaller than the sum of its proper divisors (38128979466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20201001984 is a wasteful number, since it uses less digits than its factorization.

20201001984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191975 (or 2191954 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

It can be divided in two parts, 2020100 and 1984, that added together give a square (2022084 = 1422²).

The spelling of 20201001984 in words is "twenty billion, two hundred one million, one thousand, nine hundred eighty-four".