20151403320 has 128 divisors (see below), whose sum is σ = 61031880000. Its totient is φ = 5322608640.

The previous prime is 20151403301. The next prime is 20151403369. The reversal of 20151403320 is 2330415102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5840956 + ... + 5844404.

Almost surely, 2^20151403320 is an apocalyptic number.

20151403320 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 20151403320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30515940000).

20151403320 is an abundant number, since it is smaller than the sum of its proper divisors (40880476680).

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

20151403320 is a wasteful number, since it uses less digits than its factorization.

20151403320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913 (or 3909 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20151403320 its reverse (2330415102), we get a palindrome (22481818422).

The spelling of 20151403320 in words is "twenty billion, one hundred fifty-one million, four hundred three thousand, three hundred twenty".