18548614821 has 16 divisors (see below), whose sum is σ = 27304865280. Its totient is φ = 11106142320.

The previous prime is 18548614787. The next prime is 18548614823. The reversal of 18548614821 is 12841684581.

It is not a de Polignac number, because 18548614821 - 2⁹ = 18548614309 is a prime.

It is a super-2 number, since 2×18548614821² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18548614823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3383281 + ... + 3388758.

It is an arithmetic number, because the mean of its divisors is an integer number (1706554080).

Almost surely, 2^18548614821 is an apocalyptic number.

18548614821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18548614821 is a deficient number, since it is larger than the sum of its proper divisors (8756250459).

18548614821 is a wasteful number, since it uses less digits than its factorization.

18548614821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772136.

The product of its digits is 491520, while the sum is 48.

The spelling of 18548614821 in words is "eighteen billion, five hundred forty-eight million, six hundred fourteen thousand, eight hundred twenty-one".