21980209922 has 16 divisors (see below), whose sum is σ = 36242182944. Its totient is φ = 9914736000.

The previous prime is 21980209919. The next prime is 21980209931. The reversal of 21980209922 is 22990208912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3810479 + ... + 3816242.

It is an arithmetic number, because the mean of its divisors is an integer number (2265136434).

Almost surely, 2^21980209922 is an apocalyptic number.

21980209922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21980209922 is a deficient number, since it is larger than the sum of its proper divisors (14261973022).

21980209922 is a wasteful number, since it uses less digits than its factorization.

21980209922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626865.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 21980209922 in words is "twenty-one billion, nine hundred eighty million, two hundred nine thousand, nine hundred twenty-two".