1018984420820 has 24 divisors (see below), whose sum is σ = 2143628058600. Its totient is φ = 406877430272.

The previous prime is 1018984420819. The next prime is 1018984420847. The reversal of 1018984420820 is 280244898101.

It can be written as a sum of positive squares in 4 ways, for example, as 6119307076 + 1012865113744 = 78226^2 + 1006412^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44759465 + ... + 44782224.

It is an arithmetic number, because the mean of its divisors is an integer number (89317835775).

Almost surely, 2^{1018984420820} is an apocalyptic number.

1018984420820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1018984420820 is an abundant number, since it is smaller than the sum of its proper divisors (1124643637780).

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

1018984420820 is a wasteful number, since it uses less digits than its factorization.

1018984420820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89542267 (or 89542265 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 47.

The spelling of 1018984420820 in words is "one trillion, eighteen billion, nine hundred eighty-four million, four hundred twenty thousand, eight hundred twenty".