22003219978 has 4 divisors (see below), whose sum is σ = 33004829970. Its totient is φ = 11001609988.

The previous prime is 22003219961. The next prime is 22003219991. The reversal of 22003219978 is 87991230022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20188715569 + 1814504409 = 142087^2 + 42597^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500804993 + ... + 5500804996.

Almost surely, 2^22003219978 is an apocalyptic number.

22003219978 is a deficient number, since it is larger than the sum of its proper divisors (11001609992).

22003219978 is a wasteful number, since it uses less digits than its factorization.

22003219978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001609991.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 22003219978 in words is "twenty-two billion, three million, two hundred nineteen thousand, nine hundred seventy-eight".