20418321938 has 8 divisors (see below), whose sum is σ = 35002837632. Its totient is φ = 8750709396.

The previous prime is 20418321881. The next prime is 20418321941. The reversal of 20418321938 is 83912381402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20418321895 and 20418321904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729225770 + ... + 729225797.

It is an arithmetic number, because the mean of its divisors is an integer number (4375354704).

Almost surely, 2^20418321938 is an apocalyptic number.

20418321938 is a deficient number, since it is larger than the sum of its proper divisors (14584515694).

20418321938 is a wasteful number, since it uses less digits than its factorization.

20418321938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458451576.

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

The spelling of 20418321938 in words is "twenty billion, four hundred eighteen million, three hundred twenty-one thousand, nine hundred thirty-eight".