18520017001852 has 24 divisors (see below), whose sum is σ = 32494292111232. Its totient is φ = 9235938432000.

The previous prime is 18520017001817. The next prime is 18520017001853. The reversal of 18520017001852 is 25810071002581.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18520017001853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14665333 + ... + 15878035.

It is an arithmetic number, because the mean of its divisors is an integer number (1353928837968).

Almost surely, 2^{18520017001852} is an apocalyptic number.

It is an amenable number.

18520017001852 is a deficient number, since it is larger than the sum of its proper divisors (13974275109380).

18520017001852 is a wasteful number, since it uses less digits than its factorization.

18520017001852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222629 (or 1222627 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 40.

The spelling of 18520017001852 in words is "eighteen trillion, five hundred twenty billion, seventeen million, one thousand, eight hundred fifty-two".