20640341334 has 16 divisors (see below), whose sum is σ = 42240699072. Its totient is φ = 6720111048.

The previous prime is 20640341321. The next prime is 20640341347. The reversal of 20640341334 is 43314304602.

It is an interprime number because it is at equal distance from previous prime (20640341321) and next prime (20640341347).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 40000404 + ... + 40000919.

It is an arithmetic number, because the mean of its divisors is an integer number (2640043692).

Almost surely, 2^20640341334 is an apocalyptic number.

20640341334 is an abundant number, since it is smaller than the sum of its proper divisors (21600357738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20640341334 is a wasteful number, since it uses less digits than its factorization.

20640341334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80001371.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 20640341334 its reverse (43314304602), we get a palindrome (63954645936).

The spelling of 20640341334 in words is "twenty billion, six hundred forty million, three hundred forty-one thousand, three hundred thirty-four".