21314504018 has 16 divisors (see below), whose sum is σ = 35324294400. Its totient is φ = 9594252096.

The previous prime is 21314504017. The next prime is 21314504021. The reversal of 21314504018 is 81040541312.

It is not an unprimeable number, because it can be changed into a prime (21314504017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13627418 + ... + 13628981.

It is an arithmetic number, because the mean of its divisors is an integer number (2207768400).

Almost surely, 2^21314504018 is an apocalyptic number.

21314504018 is a deficient number, since it is larger than the sum of its proper divisors (14009790382).

21314504018 is a wasteful number, since it uses less digits than its factorization.

21314504018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27256441.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 21314504018 in words is "twenty-one billion, three hundred fourteen million, five hundred four thousand, eighteen".