18019571420 has 12 divisors (see below), whose sum is σ = 37841100024. Its totient is φ = 7207828560.

The previous prime is 18019571411. The next prime is 18019571441. The reversal of 18019571420 is 2417591081.

It is a congruent number.

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, 450489266 + ... + 450489305.

It is an arithmetic number, because the mean of its divisors is an integer number (3153425002).

Almost surely, 2^18019571420 is an apocalyptic number.

18019571420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18019571420 is an abundant number, since it is smaller than the sum of its proper divisors (19821528604).

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

18019571420 is a wasteful number, since it uses less digits than its factorization.

18019571420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900978580 (or 900978578 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 18019571420 in words is "eighteen billion, nineteen million, five hundred seventy-one thousand, four hundred twenty".