18255213402 has 16 divisors (see below), whose sum is σ = 37497195552. Its totient is φ = 5920609680.

The previous prime is 18255213401. The next prime is 18255213461. The reversal of 18255213402 is 20431255281.

It is not an unprimeable number, because it can be changed into a prime (18255213401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41115124 + ... + 41115567.

It is an arithmetic number, because the mean of its divisors is an integer number (2343574722).

Almost surely, 2^18255213402 is an apocalyptic number.

18255213402 is an abundant number, since it is smaller than the sum of its proper divisors (19241982150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18255213402 is a wasteful number, since it uses less digits than its factorization.

18255213402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82230733.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 18255213402 its reverse (20431255281), we get a palindrome (38686468683).

The spelling of 18255213402 in words is "eighteen billion, two hundred fifty-five million, two hundred thirteen thousand, four hundred two".