18537421228275 has 24 divisors (see below), whose sum is σ = 30832060621824. Its totient is φ = 9827423303200.

The previous prime is 18537421228273. The next prime is 18537421228279. The reversal of 18537421228275 is 57282212473581.

It is a happy number.

It is not a de Polignac number, because 18537421228275 - 2¹ = 18537421228273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18537421228273) 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 23 ways as a sum of consecutive naturals, for example, 740004291 + ... + 740029340.

It is an arithmetic number, because the mean of its divisors is an integer number (1284669192576).

Almost surely, 2^{18537421228275} is an apocalyptic number.

18537421228275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18537421228275 is a deficient number, since it is larger than the sum of its proper divisors (12294639393549).

18537421228275 is a wasteful number, since it uses less digits than its factorization.

18537421228275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480033811 (or 1480033806 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 57.

The spelling of 18537421228275 in words is "eighteen trillion, five hundred thirty-seven billion, four hundred twenty-one million, two hundred twenty-eight thousand, two hundred seventy-five".