19980737221 has 8 divisors (see below), whose sum is σ = 20070910080. Its totient is φ = 19890602592.

The previous prime is 19980737197. The next prime is 19980737233. The reversal of 19980737221 is 12273708991.

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

It is a cyclic number.

It is not a de Polignac number, because 19980737221 - 2¹⁵ = 19980704453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980737321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765860 + ... + 1777138.

It is an arithmetic number, because the mean of its divisors is an integer number (2508863760).

Almost surely, 2^19980737221 is an apocalyptic number.

It is an amenable number.

19980737221 is a deficient number, since it is larger than the sum of its proper divisors (90172859).

19980737221 is a wasteful number, since it uses less digits than its factorization.

19980737221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19115.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 19980737221 in words is "nineteen billion, nine hundred eighty million, seven hundred thirty-seven thousand, two hundred twenty-one".