22181778002 has 8 divisors (see below), whose sum is σ = 33293690496. Its totient is φ = 11083881172.

The previous prime is 22181777999. The next prime is 22181778061. The reversal of 22181778002 is 20087718122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22181778002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3499958 + ... + 3506289.

It is an arithmetic number, because the mean of its divisors is an integer number (4161711312).

Almost surely, 2^22181778002 is an apocalyptic number.

22181778002 is a deficient number, since it is larger than the sum of its proper divisors (11111912494).

22181778002 is a wasteful number, since it uses less digits than its factorization.

22181778002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007832.

The product of its (nonzero) digits is 25088, while the sum is 38.

The spelling of 22181778002 in words is "twenty-two billion, one hundred eighty-one million, seven hundred seventy-eight thousand, two".