18603313421 has 16 divisors (see below), whose sum is σ = 24414466560. Its totient is φ = 13733135280.

The previous prime is 18603313409. The next prime is 18603313457. The reversal of 18603313421 is 12431330681.

It is a cyclic number.

It is not a de Polignac number, because 18603313421 - 2³⁴ = 1423444237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18603313121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6356471 + ... + 6359396.

It is an arithmetic number, because the mean of its divisors is an integer number (1525904160).

Almost surely, 2^18603313421 is an apocalyptic number.

18603313421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18603313421 is a deficient number, since it is larger than the sum of its proper divisors (5811153139).

18603313421 is a wasteful number, since it uses less digits than its factorization.

18603313421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12715904.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 18603313421 in words is "eighteen billion, six hundred three million, three hundred thirteen thousand, four hundred twenty-one".