20320311000 has 128 divisors (see below), whose sum is σ = 69163061760. Its totient is φ = 4926128000.

The previous prime is 20320310999. The next prime is 20320311001. The reversal of 20320311000 is 11302302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20320310999) and next prime (20320311001).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320311001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274884 + ... + 340883.

It is an arithmetic number, because the mean of its divisors is an integer number (540336420).

Almost surely, 2^20320311000 is an apocalyptic number.

20320311000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320311000 is an abundant number, since it is smaller than the sum of its proper divisors (48842750760).

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

20320311000 is a wasteful number, since it uses less digits than its factorization.

20320311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615802 (or 615788 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20320311000 its reverse (11302302), we get a palindrome (20331613302).

The spelling of 20320311000 in words is "twenty billion, three hundred twenty million, three hundred eleven thousand".