18890909308 has 6 divisors (see below), whose sum is σ = 33059091296. Its totient is φ = 9445454652.

The previous prime is 18890909251. The next prime is 18890909321. The reversal of 18890909308 is 80390909881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2361363660 + ... + 2361363667.

Almost surely, 2^18890909308 is an apocalyptic number.

It is an amenable number.

18890909308 is a deficient number, since it is larger than the sum of its proper divisors (14168181988).

18890909308 is a wasteful number, since it uses less digits than its factorization.

18890909308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722727331 (or 4722727329 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 18890909308 in words is "eighteen billion, eight hundred ninety million, nine hundred nine thousand, three hundred eight".