22212778780 has 48 divisors (see below), whose sum is σ = 49158658080. Its totient is φ = 8407749888.

The previous prime is 22212778733. The next prime is 22212778787. The reversal of 22212778780 is 8787721222.

It is a super-2 number, since 2×22212778780² (a number of 21 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 22212778780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212778787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299934 + ... + 366586.

It is an arithmetic number, because the mean of its divisors is an integer number (1024138710).

Almost surely, 2^22212778780 is an apocalyptic number.

22212778780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212778780 is an abundant number, since it is smaller than the sum of its proper divisors (26945879300).

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

22212778780 is a wasteful number, since it uses less digits than its factorization.

22212778780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67558 (or 67556 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 46.

The spelling of 22212778780 in words is "twenty-two billion, two hundred twelve million, seven hundred seventy-eight thousand, seven hundred eighty".