18312273950 has 24 divisors (see below), whose sum is σ = 34785532512. Its totient is φ = 7169059520.

The previous prime is 18312273949. The next prime is 18312273953. The reversal of 18312273950 is 5937221381.

It is a junction number, because it is equal to n+sod(n) for n = 18312273898 and 18312273907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312273953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3893879 + ... + 3898578.

It is an arithmetic number, because the mean of its divisors is an integer number (1449397188).

Almost surely, 2^18312273950 is an apocalyptic number.

18312273950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18312273950 is a deficient number, since it is larger than the sum of its proper divisors (16473258562).

18312273950 is a wasteful number, since it uses less digits than its factorization.

18312273950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7792516 (or 7792511 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 18312273950 in words is "eighteen billion, three hundred twelve million, two hundred seventy-three thousand, nine hundred fifty".