20083981640 has 32 divisors (see below), whose sum is σ = 45863426880. Its totient is φ = 7913687232.

The previous prime is 20083981607. The next prime is 20083981649. The reversal of 20083981640 is 4618938002.

It is not an unprimeable number, because it can be changed into a prime (20083981649) 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, 3744332 + ... + 3749691.

It is an arithmetic number, because the mean of its divisors is an integer number (1433232090).

Almost surely, 2^20083981640 is an apocalyptic number.

20083981640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20083981640 is an abundant number, since it is smaller than the sum of its proper divisors (25779445240).

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

20083981640 is a wasteful number, since it uses less digits than its factorization.

20083981640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7494101 (or 7494097 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 20083981640 in words is "twenty billion, eighty-three million, nine hundred eighty-one thousand, six hundred forty".