18405220354 has 8 divisors (see below), whose sum is σ = 27620167680. Its totient is φ = 9198497796.

The previous prime is 18405220331. The next prime is 18405220387. The reversal of 18405220354 is 45302250481.

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

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, 2050594 + ... + 2059549.

It is an arithmetic number, because the mean of its divisors is an integer number (3452520960).

Almost surely, 2^18405220354 is an apocalyptic number.

18405220354 is a deficient number, since it is larger than the sum of its proper divisors (9214947326).

18405220354 is a wasteful number, since it uses less digits than its factorization.

18405220354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112384.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 18405220354 in words is "eighteen billion, four hundred five million, two hundred twenty thousand, three hundred fifty-four".