22000209978 has 32 divisors (see below), whose sum is σ = 45149690880. Its totient is φ = 7143338160.

The previous prime is 22000209977. The next prime is 22000209997. The reversal of 22000209978 is 87990200022.

It is not an unprimeable number, because it can be changed into a prime (22000209971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125368 + ... + 244371.

It is an arithmetic number, because the mean of its divisors is an integer number (1410927840).

Almost surely, 2^22000209978 is an apocalyptic number.

22000209978 is an abundant number, since it is smaller than the sum of its proper divisors (23149480902).

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

22000209978 is a wasteful number, since it uses less digits than its factorization.

22000209978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370002.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 22000209978 in words is "twenty-two billion, two hundred nine thousand, nine hundred seventy-eight".