13987269621 has 60 divisors (see below), whose sum is σ = 22791347040. Its totient is φ = 8544463200.

The previous prime is 13987269619. The next prime is 13987269641. The reversal of 13987269621 is 12696278931.

13987269621 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 7 + 2 + 6 + 9 + 621 = 666.

It is not a de Polignac number, because 13987269621 - 2¹ = 13987269619 is a prime.

It is a super-2 number, since 2×13987269621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13987269641) 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 59 ways as a sum of consecutive naturals, for example, 1899096 + ... + 1906446.

It is an arithmetic number, because the mean of its divisors is an integer number (379855784).

Almost surely, 2^13987269621 is an apocalyptic number.

It is an amenable number.

13987269621 is a deficient number, since it is larger than the sum of its proper divisors (8804077419).

13987269621 is a wasteful number, since it uses less digits than its factorization.

13987269621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528 (or 7506 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 13987269621 in words is "thirteen billion, nine hundred eighty-seven million, two hundred sixty-nine thousand, six hundred twenty-one".