18098821545 has 96 divisors (see below), whose sum is σ = 35680942080. Its totient is φ = 7789219200.

The previous prime is 18098821519. The next prime is 18098821579. The reversal of 18098821545 is 54512889081.

It is not a de Polignac number, because 18098821545 - 2¹⁰ = 18098820521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2272320 + ... + 2280270.

It is an arithmetic number, because the mean of its divisors is an integer number (371676480).

Almost surely, 2^18098821545 is an apocalyptic number.

18098821545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18098821545 is a deficient number, since it is larger than the sum of its proper divisors (17582120535).

18098821545 is a wasteful number, since it uses less digits than its factorization.

18098821545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8155 (or 8148 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 51.

The spelling of 18098821545 in words is "eighteen billion, ninety-eight million, eight hundred twenty-one thousand, five hundred forty-five".