21232220198 has 16 divisors (see below), whose sum is σ = 36451399680. Its totient is φ = 9086195976.

The previous prime is 21232220183. The next prime is 21232220257. The reversal of 21232220198 is 89102223212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100678 + ... + 1119801.

It is an arithmetic number, because the mean of its divisors is an integer number (2278212480).

Almost surely, 2^21232220198 is an apocalyptic number.

21232220198 is a deficient number, since it is larger than the sum of its proper divisors (15219179482).

21232220198 is a wasteful number, since it uses less digits than its factorization.

21232220198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221171.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 21232220198 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty thousand, one hundred ninety-eight".