1018189192420 has 12 divisors (see below), whose sum is σ = 2138197304124. Its totient is φ = 407275676960.

The previous prime is 1018189192411. The next prime is 1018189192439. The reversal of 1018189192420 is 242919818101.

It can be written as a sum of positive squares in 2 ways, for example, as 676710245376 + 341478947044 = 822624^2 + 584362^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25454729791 + ... + 25454729830.

It is an arithmetic number, because the mean of its divisors is an integer number (178183108677).

Almost surely, 2^{1018189192420} is an apocalyptic number.

1018189192420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1018189192420 is an abundant number, since it is smaller than the sum of its proper divisors (1120008111704).

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

1018189192420 is a wasteful number, since it uses less digits than its factorization.

1018189192420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50909459630 (or 50909459628 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 46.

The spelling of 1018189192420 in words is "one trillion, eighteen billion, one hundred eighty-nine million, one hundred ninety-two thousand, four hundred twenty".