220481871786 has 48 divisors (see below), whose sum is σ = 521326997568. Its totient is φ = 66788582400.

The previous prime is 220481871763. The next prime is 220481871839. The reversal of 220481871786 is 687178184022.

220481871786 is a `hidden beast` number, since 2 + 2 + 0 + 481 + 87 + 1 + 7 + 86 = 666.

It is a super-2 number, since 2×220481871786² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 353130 + ... + 752106.

It is an arithmetic number, because the mean of its divisors is an integer number (10860979116).

Almost surely, 2^220481871786 is an apocalyptic number.

220481871786 is an abundant number, since it is smaller than the sum of its proper divisors (300845125782).

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

220481871786 is a wasteful number, since it uses less digits than its factorization.

220481871786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401787 (or 401784 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 54.

The spelling of 220481871786 in words is "two hundred twenty billion, four hundred eighty-one million, eight hundred seventy-one thousand, seven hundred eighty-six".