18491343050 has 12 divisors (see below), whose sum is σ = 34393898166. Its totient is φ = 7396537200.

The previous prime is 18491343043. The next prime is 18491343053. The reversal of 18491343050 is 5034319481.

It can be written as a sum of positive squares in 3 ways, for example, as 17159166049 + 1332177001 = 130993^2 + 36499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18491342995 and 18491343013.

It is not an unprimeable number, because it can be changed into a prime (18491343053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184913381 + ... + 184913480.

Almost surely, 2^18491343050 is an apocalyptic number.

18491343050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18491343050 is a deficient number, since it is larger than the sum of its proper divisors (15902555116).

18491343050 is a wasteful number, since it uses less digits than its factorization.

18491343050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369826873 (or 369826868 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 18491343050 in words is "eighteen billion, four hundred ninety-one million, three hundred forty-three thousand, fifty".