21387922922049 has 16 divisors (see below), whose sum is σ = 29767935120000. Its totient is φ = 13633714043136.

The previous prime is 21387922922017. The next prime is 21387922922063. The reversal of 21387922922049 is 94022922978312.

It is not a de Polignac number, because 21387922922049 - 2⁵ = 21387922922017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21387922921983 and 21387922922001.

It is not an unprimeable number, because it can be changed into a prime (21387922922099) 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, 56188984 + ... + 56568345.

It is an arithmetic number, because the mean of its divisors is an integer number (1860495945000).

Almost surely, 2^{21387922922049} is an apocalyptic number.

It is an amenable number.

21387922922049 is a deficient number, since it is larger than the sum of its proper divisors (8380012197951).

21387922922049 is a wasteful number, since it uses less digits than its factorization.

21387922922049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112760104.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 21387922922049 in words is "twenty-one trillion, three hundred eighty-seven billion, nine hundred twenty-two million, nine hundred twenty-two thousand, forty-nine".