20221310987 has 16 divisors (see below), whose sum is σ = 21040979904. Its totient is φ = 19418112000.

The previous prime is 20221310981. The next prime is 20221311037. The reversal of 20221310987 is 78901312202.

It is a cyclic number.

It is not a de Polignac number, because 20221310987 - 2⁴ = 20221310971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221310981) 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, 1860533 + ... + 1871369.

It is an arithmetic number, because the mean of its divisors is an integer number (1315061244).

Almost surely, 2^20221310987 is an apocalyptic number.

20221310987 is a deficient number, since it is larger than the sum of its proper divisors (819668917).

20221310987 is a wasteful number, since it uses less digits than its factorization.

20221310987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11590.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 20221310987 in words is "twenty billion, two hundred twenty-one million, three hundred ten thousand, nine hundred eighty-seven".