20011321340 has 12 divisors (see below), whose sum is σ = 42023774856. Its totient is φ = 8004528528.

The previous prime is 20011321339. The next prime is 20011321397. The reversal of 20011321340 is 4312311002.

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 3 ways as a sum of consecutive naturals, for example, 500283014 + ... + 500283053.

It is an arithmetic number, because the mean of its divisors is an integer number (3501981238).

Almost surely, 2^20011321340 is an apocalyptic number.

20011321340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011321340 is an abundant number, since it is smaller than the sum of its proper divisors (22012453516).

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

20011321340 is a wasteful number, since it uses less digits than its factorization.

20011321340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000566076 (or 1000566074 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20011321340 its reverse (4312311002), we get a palindrome (24323632342).

The spelling of 20011321340 in words is "twenty billion, eleven million, three hundred twenty-one thousand, three hundred forty".