20120401320 has 64 divisors (see below), whose sum is σ = 60372864000. Its totient is φ = 5364403968.

The previous prime is 20120401307. The next prime is 20120401321. The reversal of 20120401320 is 2310402102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20120401320.

It is not an unprimeable number, because it can be changed into a prime (20120401321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763321 + ... + 789239.

It is an arithmetic number, because the mean of its divisors is an integer number (943326000).

Almost surely, 2^20120401320 is an apocalyptic number.

20120401320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120401320 is an abundant number, since it is smaller than the sum of its proper divisors (40252462680).

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

20120401320 is a wasteful number, since it uses less digits than its factorization.

20120401320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32402 (or 32398 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20120401320 its reverse (2310402102), we get a palindrome (22430803422).

The spelling of 20120401320 in words is "twenty billion, one hundred twenty million, four hundred one thousand, three hundred twenty".