18357403906737 has 12 divisors (see below), whose sum is σ = 30304285814400. Its totient is φ = 10489945089528.

The previous prime is 18357403906697. The next prime is 18357403906747. The reversal of 18357403906737 is 73760930475381.

It is a happy number.

18357403906737 is a `hidden beast` number, since 1 + 8 + 3 + 57 + 403 + 90 + 67 + 37 = 666.

It is not a de Polignac number, because 18357403906737 - 2⁷ = 18357403906609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 291387363599 = 18357403906737 / (1 + 8 + 3 + 5 + 7 + 4 + 0 + 3 + 9 + 0 + 6 + 7 + 3 + 7).

It is not an unprimeable number, because it can be changed into a prime (18357403906747) 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, 145693681737 + ... + 145693681862.

It is an arithmetic number, because the mean of its divisors is an integer number (2525357151200).

Almost surely, 2^{18357403906737} is an apocalyptic number.

It is an amenable number.

18357403906737 is a deficient number, since it is larger than the sum of its proper divisors (11946881907663).

18357403906737 is a wasteful number, since it uses less digits than its factorization.

18357403906737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291387363612 (or 291387363609 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 63.

The spelling of 18357403906737 in words is "eighteen trillion, three hundred fifty-seven billion, four hundred three million, nine hundred six thousand, seven hundred thirty-seven".