20311117340 has 12 divisors (see below), whose sum is σ = 42653346456. Its totient is φ = 8124446928.

The previous prime is 20311117339. The next prime is 20311117367. The reversal of 20311117340 is 4371111302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507777914 + ... + 507777953.

It is an arithmetic number, because the mean of its divisors is an integer number (3554445538).

Almost surely, 2^20311117340 is an apocalyptic number.

20311117340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311117340 is an abundant number, since it is smaller than the sum of its proper divisors (22342229116).

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

20311117340 is a wasteful number, since it uses less digits than its factorization.

20311117340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015555876 (or 1015555874 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 20311117340 its reverse (4371111302), we get a palindrome (24682228642).

The spelling of 20311117340 in words is "twenty billion, three hundred eleven million, one hundred seventeen thousand, three hundred forty".