20340320400 has 120 divisors (see below), whose sum is σ = 72396512160. Its totient is φ = 5424082560.

The previous prime is 20340320359. The next prime is 20340320419. The reversal of 20340320400 is 402304302.

20340320400 is a `hidden beast` number, since 2 + 0 + 340 + 320 + 4 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 930882 + ... + 952481.

It is an arithmetic number, because the mean of its divisors is an integer number (603304268).

Almost surely, 2^20340320400 is an apocalyptic number.

20340320400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20340320400 is an abundant number, since it is smaller than the sum of its proper divisors (52056191760).

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

20340320400 is a wasteful number, since it uses less digits than its factorization.

20340320400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883390 (or 1883373 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20340320400 its reverse (402304302), we get a palindrome (20742624702).

The spelling of 20340320400 in words is "twenty billion, three hundred forty million, three hundred twenty thousand, four hundred".