201340231020 has 36 divisors (see below), whose sum is σ = 610732034640. Its totient is φ = 53690728224.

The previous prime is 201340230953. The next prime is 201340231049. The reversal of 201340231020 is 20132043102.

201340231020 is a `hidden beast` number, since 201 + 340 + 23 + 102 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 201340230984 and 201340231002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 559278240 + ... + 559278599.

It is an arithmetic number, because the mean of its divisors is an integer number (16964778740).

Almost surely, 2^201340231020 is an apocalyptic number.

201340231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201340231020 is an abundant number, since it is smaller than the sum of its proper divisors (409391803620).

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

201340231020 is a wasteful number, since it uses less digits than its factorization.

201340231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118556854 (or 1118556849 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 201340231020 its reverse (20132043102), we get a palindrome (221472274122).

The spelling of 201340231020 in words is "two hundred one billion, three hundred forty million, two hundred thirty-one thousand, twenty".