18906690248 has 8 divisors (see below), whose sum is σ = 35450044230. Its totient is φ = 9453345120.

The previous prime is 18906690217. The next prime is 18906690251. The reversal of 18906690248 is 84209660981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10832230084 + 8074460164 = 104078^2 + 89858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18906690248² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18906690248.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1181668133 + ... + 1181668148.

Almost surely, 2^18906690248 is an apocalyptic number.

It is an amenable number.

18906690248 is a deficient number, since it is larger than the sum of its proper divisors (16543353982).

18906690248 is a wasteful number, since it uses less digits than its factorization.

18906690248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363336287 (or 2363336283 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 18906690248 in words is "eighteen billion, nine hundred six million, six hundred ninety thousand, two hundred forty-eight".