18524410421 has 6 divisors (see below), whose sum is σ = 20361542166. Its totient is φ = 16840373000.

The previous prime is 18524410409. The next prime is 18524410447. The reversal of 18524410421 is 12401442581.

It can be written as a sum of positive squares in only one way, i.e., 15821866225 + 2702544196 = 125785^2 + 51986^2 .

It is not a de Polignac number, because 18524410421 - 2⁶ = 18524410357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18524610421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76547030 + ... + 76547271.

It is an arithmetic number, because the mean of its divisors is an integer number (3393590361).

Almost surely, 2^18524410421 is an apocalyptic number.

18524410421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18524410421 is a deficient number, since it is larger than the sum of its proper divisors (1837131745).

18524410421 is a wasteful number, since it uses less digits than its factorization.

18524410421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153094323 (or 153094312 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The spelling of 18524410421 in words is "eighteen billion, five hundred twenty-four million, four hundred ten thousand, four hundred twenty-one".