18070212493 has 4 divisors (see below), whose sum is σ = 18298949440. Its totient is φ = 17841475548.

The previous prime is 18070212491. The next prime is 18070212539. The reversal of 18070212493 is 39421207081.

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 a cyclic number.

It is not a de Polignac number, because 18070212493 - 2¹ = 18070212491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18070212491) 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, 114368355 + ... + 114368512.

It is an arithmetic number, because the mean of its divisors is an integer number (4574737360).

Almost surely, 2^18070212493 is an apocalyptic number.

It is an amenable number.

18070212493 is a deficient number, since it is larger than the sum of its proper divisors (228736947).

18070212493 is an equidigital number, since it uses as much as digits as its factorization.

18070212493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228736946.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 18070212493 in words is "eighteen billion, seventy million, two hundred twelve thousand, four hundred ninety-three".