220029878450 has 18 divisors (see below), whose sum is σ = 409261743351. Its totient is φ = 88010624640.

The previous prime is 220029878447. The next prime is 220029878491. The reversal of 220029878450 is 54878920022.

It can be written as a sum of positive squares in 5 ways, for example, as 83779565809 + 136250312641 = 289447^2 + 369121^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=331685.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220029878395 and 220029878404.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3283682 + ... + 3350018.

Almost surely, 2^220029878450 is an apocalyptic number.

220029878450 is a deficient number, since it is larger than the sum of its proper divisors (189231864901).

220029878450 is an frugal number, since it uses more digits than its factorization.

220029878450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132686 (or 66344 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 220029878450 in words is "two hundred twenty billion, twenty-nine million, eight hundred seventy-eight thousand, four hundred fifty".