20464381418 has 8 divisors (see below), whose sum is σ = 33057846948. Its totient is φ = 9445099104.

The previous prime is 20464381411. The next prime is 20464381429. The reversal of 20464381418 is 81418346402.

It can be written as a sum of positive squares in 2 ways, for example, as 20299695529 + 164685889 = 142477^2 + 12833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20464381411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393545771 + ... + 393545822.

Almost surely, 2^20464381418 is an apocalyptic number.

20464381418 is a deficient number, since it is larger than the sum of its proper divisors (12593465530).

20464381418 is a wasteful number, since it uses less digits than its factorization.

20464381418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787091608.

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 20464381418 in words is "twenty billion, four hundred sixty-four million, three hundred eighty-one thousand, four hundred eighteen".