17889220946 has 16 divisors (see below), whose sum is σ = 27648874176. Its totient is φ = 8674505136.

The previous prime is 17889220939. The next prime is 17889221003. The reversal of 17889220946 is 64902298871.

It is a junction number, because it is equal to n+sod(n) for n = 17889220891 and 17889220900.

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, 371006 + ... + 416441.

It is an arithmetic number, because the mean of its divisors is an integer number (1728054636).

Almost surely, 2^17889220946 is an apocalyptic number.

17889220946 is a deficient number, since it is larger than the sum of its proper divisors (9759653230).

17889220946 is a wasteful number, since it uses less digits than its factorization.

17889220946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787793.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 17889220946 in words is "seventeen billion, eight hundred eighty-nine million, two hundred twenty thousand, nine hundred forty-six".