18025224834261 has 4 divisors (see below), whose sum is σ = 24033633112352. Its totient is φ = 12016816556172.

The previous prime is 18025224834257. The next prime is 18025224834277. The reversal of 18025224834261 is 16243842252081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18025224834261 - 2² = 18025224834257 is a prime.

It is a super-2 number, since 2×18025224834261² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18025224834261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025224834161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3004204139041 + ... + 3004204139046.

It is an arithmetic number, because the mean of its divisors is an integer number (6008408278088).

Almost surely, 2^{18025224834261} is an apocalyptic number.

It is an amenable number.

18025224834261 is a deficient number, since it is larger than the sum of its proper divisors (6008408278091).

18025224834261 is an equidigital number, since it uses as much as digits as its factorization.

18025224834261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008408278090.

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 18025224834261 in words is "eighteen trillion, twenty-five billion, two hundred twenty-four million, eight hundred thirty-four thousand, two hundred sixty-one".