18393914452 has 12 divisors (see below), whose sum is σ = 32474212596. Its totient is φ = 9115568000.

The previous prime is 18393914437. The next prime is 18393914467. The reversal of 18393914452 is 25441939381.

It is an interprime number because it is at equal distance from previous prime (18393914437) and next prime (18393914467).

It can be written as a sum of positive squares in 2 ways, for example, as 1024256016 + 17369658436 = 32004^2 + 131794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18393914396 and 18393914405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20346799 + ... + 20347702.

It is an arithmetic number, because the mean of its divisors is an integer number (2706184383).

Almost surely, 2^18393914452 is an apocalyptic number.

It is an amenable number.

18393914452 is a deficient number, since it is larger than the sum of its proper divisors (14080298144).

18393914452 is a wasteful number, since it uses less digits than its factorization.

18393914452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40694618 (or 40694616 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The spelling of 18393914452 in words is "eighteen billion, three hundred ninety-three million, nine hundred fourteen thousand, four hundred fifty-two".