18283778172373 has 32 divisors (see below), whose sum is σ = 22039757291520. Its totient is φ = 14836153812480.

The previous prime is 18283778172371. The next prime is 18283778172383. The reversal of 18283778172373 is 37327187738281.

It is not a de Polignac number, because 18283778172373 - 2¹ = 18283778172371 is a prime.

It is a super-2 number, since 2×18283778172373² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18283778172299 and 18283778172308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18283778172371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19981093 + ... + 20876101.

It is an arithmetic number, because the mean of its divisors is an integer number (688742415360).

Almost surely, 2^{18283778172373} is an apocalyptic number.

It is an amenable number.

18283778172373 is a deficient number, since it is larger than the sum of its proper divisors (3755979119147).

18283778172373 is a wasteful number, since it uses less digits than its factorization.

18283778172373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897097.

The product of its digits is 132765696, while the sum is 67.

The spelling of 18283778172373 in words is "eighteen trillion, two hundred eighty-three billion, seven hundred seventy-eight million, one hundred seventy-two thousand, three hundred seventy-three".