18039073101049 has 81 divisors (see below), whose sum is σ = 24981931746639. Its totient is φ = 12972099460320.

The previous prime is 18039073101041. The next prime is 18039073101061. The reversal of 18039073101049 is 94010137093081.

The square root of 18039073101049 is 4247243.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2668501938025 + 15370571163024 = 1633555^2 + 3920532^2 .

It is not a de Polignac number, because 18039073101049 - 2³ = 18039073101041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18039073101041) by changing a digit.

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 80 ways as a sum of consecutive naturals, for example, 4251488122 + ... + 4251492364.

Almost surely, 2^{18039073101049} is an apocalyptic number.

18039073101049 is the 4247243-rd square number.

18039073101049 is the 2123622-nd centered octagonal number.

It is an amenable number.

18039073101049 is a deficient number, since it is larger than the sum of its proper divisors (6942858645590).

18039073101049 is an frugal number, since it uses more digits than its factorization.

18039073101049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8548 (or 4274 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 18039073101049 in words is "eighteen trillion, thirty-nine billion, seventy-three million, one hundred one thousand, forty-nine".