20018907040 has 48 divisors (see below), whose sum is σ = 51594187680. Its totient is φ = 7279601920.

The previous prime is 20018906981. The next prime is 20018907059. The reversal of 20018907040 is 4070981002.

It is a junction number, because it is equal to n+sod(n) for n = 20018906993 and 20018907011.

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, 5685430 + ... + 5688949.

It is an arithmetic number, because the mean of its divisors is an integer number (1074878910).

Almost surely, 2^20018907040 is an apocalyptic number.

20018907040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20018907040 is an abundant number, since it is smaller than the sum of its proper divisors (31575280640).

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

20018907040 is a wasteful number, since it uses less digits than its factorization.

20018907040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11374405 (or 11374397 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 20018907040 in words is "twenty billion, eighteen million, nine hundred seven thousand, forty".