20102001984 has 84 divisors (see below), whose sum is σ = 59752833504. Its totient is φ = 6700662144.

The previous prime is 20102001977. The next prime is 20102001989. The reversal of 20102001984 is 48910020102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102001989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630732 + ... + 661835.

It is an arithmetic number, because the mean of its divisors is an integer number (711343256).

Almost surely, 2^20102001984 is an apocalyptic number.

20102001984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20102001984 is an abundant number, since it is smaller than the sum of its proper divisors (39650831520).

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

20102001984 is an equidigital number, since it uses as much as digits as its factorization.

20102001984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292594 (or 1292572 counting only the distinct ones).

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

The spelling of 20102001984 in words is "twenty billion, one hundred two million, one thousand, nine hundred eighty-four".