20315404320 has 96 divisors (see below), whose sum is σ = 64082648448. Its totient is φ = 5409896448.

The previous prime is 20315404301. The next prime is 20315404337. The reversal of 20315404320 is 2340451302.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319852 + ... + 378068.

It is an arithmetic number, because the mean of its divisors is an integer number (667527588).

Almost surely, 2^20315404320 is an apocalyptic number.

20315404320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20315404320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32041324224).

20315404320 is an abundant number, since it is smaller than the sum of its proper divisors (43767244128).

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

20315404320 is a wasteful number, since it uses less digits than its factorization.

20315404320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58962 (or 58954 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20315404320 its reverse (2340451302), we get a palindrome (22655855622).

The spelling of 20315404320 in words is "twenty billion, three hundred fifteen million, four hundred four thousand, three hundred twenty".