220487291874 has 24 divisors (see below), whose sum is σ = 477731102940. Its totient is φ = 73494435168.

The previous prime is 220487291873. The next prime is 220487291881. The reversal of 220487291874 is 478192784022.

220487291874 is a `hidden beast` number, since 2 + 2 + 0 + 487 + 2 + 91 + 8 + 74 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 220483776249 + 3515625 = 469557^2 + 1875^2 .

It is a super-2 number, since 2×220487291874² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220487291874.

It is not an unprimeable number, because it can be changed into a prime (220487291873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1872412 + ... + 1986680.

Almost surely, 2^220487291874 is an apocalyptic number.

220487291874 is an abundant number, since it is smaller than the sum of its proper divisors (257243811066).

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

220487291874 is a wasteful number, since it uses less digits than its factorization.

220487291874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221474 (or 221471 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 220487291874 in words is "two hundred twenty billion, four hundred eighty-seven million, two hundred ninety-one thousand, eight hundred seventy-four".