18072021159858 has 16 divisors (see below), whose sum is σ = 36147332161440. Its totient is φ = 6023458746336.

The previous prime is 18072021159811. The next prime is 18072021159911. The reversal of 18072021159858 is 85895112027081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18072021159798 and 18072021159807.

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, 137005323 + ... + 137137166.

It is an arithmetic number, because the mean of its divisors is an integer number (2259208260090).

Almost surely, 2^{18072021159858} is an apocalyptic number.

18072021159858 is an abundant number, since it is smaller than the sum of its proper divisors (18075311001582).

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

18072021159858 is a wasteful number, since it uses less digits than its factorization.

18072021159858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274153481.

The product of its (nonzero) digits is 3225600, while the sum is 57.

The spelling of 18072021159858 in words is "eighteen trillion, seventy-two billion, twenty-one million, one hundred fifty-nine thousand, eight hundred fifty-eight".