20081340072 has 32 divisors (see below), whose sum is σ = 55781500800. Its totient is φ = 6693779952.

The previous prime is 20081340067. The next prime is 20081340073. The reversal of 20081340072 is 27004318002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20081340073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46484368 + ... + 46484799.

It is an arithmetic number, because the mean of its divisors is an integer number (1743171900).

Almost surely, 2^20081340072 is an apocalyptic number.

It is an amenable number.

20081340072 is an abundant number, since it is smaller than the sum of its proper divisors (35700160728).

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

20081340072 is a wasteful number, since it uses less digits than its factorization.

20081340072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92969182 (or 92969172 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

Adding to 20081340072 its reverse (27004318002), we get a palindrome (47085658074).

The spelling of 20081340072 in words is "twenty billion, eighty-one million, three hundred forty thousand, seventy-two".