20401334340 has 24 divisors (see below), whose sum is σ = 57123736320. Its totient is φ = 5440355808.

The previous prime is 20401334333. The next prime is 20401334357. The reversal of 20401334340 is 4343310402.

It is a self number, because there is not a number n which added to its sum of digits gives 20401334340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170011060 + ... + 170011179.

It is an arithmetic number, because the mean of its divisors is an integer number (2380155680).

Almost surely, 2^20401334340 is an apocalyptic number.

20401334340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20401334340 is an abundant number, since it is smaller than the sum of its proper divisors (36722401980).

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

20401334340 is a wasteful number, since it uses less digits than its factorization.

20401334340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340022251 (or 340022249 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20401334340 its reverse (4343310402), we get a palindrome (24744644742).

The spelling of 20401334340 in words is "twenty billion, four hundred one million, three hundred thirty-four thousand, three hundred forty".