18303872949 has 12 divisors (see below), whose sum is σ = 27588446496. Its totient is φ = 11672034792.

The previous prime is 18303872941. The next prime is 18303872963. The reversal of 18303872949 is 94927830381.

It is not a de Polignac number, because 18303872949 - 2³ = 18303872941 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 18303872895 and 18303872904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18303872941) 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, 44212047 + ... + 44212460.

It is an arithmetic number, because the mean of its divisors is an integer number (2299037208).

Almost surely, 2^18303872949 is an apocalyptic number.

It is an amenable number.

18303872949 is a deficient number, since it is larger than the sum of its proper divisors (9284573547).

18303872949 is a wasteful number, since it uses less digits than its factorization.

18303872949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88424536 (or 88424533 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 18303872949 in words is "eighteen billion, three hundred three million, eight hundred seventy-two thousand, nine hundred forty-nine".