13921021154 has 36 divisors (see below), whose sum is σ = 21709033794. Its totient is φ = 6694394112.

The previous prime is 13921021123. The next prime is 13921021157. The reversal of 13921021154 is 45112012931.

It can be written as a sum of positive squares in 3 ways, for example, as 13230750625 + 690270529 = 115025^2 + 26273^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13921021157) 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 17 ways as a sum of consecutive naturals, for example, 70664984 + ... + 70665180.

Almost surely, 2^13921021154 is an apocalyptic number.

13921021154 is a deficient number, since it is larger than the sum of its proper divisors (7788012640).

13921021154 is an frugal number, since it uses more digits than its factorization.

13921021154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 13921021154 in words is "thirteen billion, nine hundred twenty-one million, twenty-one thousand, one hundred fifty-four".