21431134586548 has 6 divisors (see below), whose sum is σ = 37504485526466. Its totient is φ = 10715567293272.

The previous prime is 21431134586503. The next prime is 21431134586623. The reversal of 21431134586548 is 84568543113412.

It can be written as a sum of positive squares in only one way, i.e., 18503435639844 + 2927698946704 = 4301562^2 + 1711052^2 .

It is a super-3 number, since 3×21431134586548³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2678891823315 + ... + 2678891823322.

Almost surely, 2^{21431134586548} is an apocalyptic number.

It is an amenable number.

21431134586548 is a deficient number, since it is larger than the sum of its proper divisors (16073350939918).

21431134586548 is a wasteful number, since it uses less digits than its factorization.

21431134586548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5357783646641 (or 5357783646639 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 55.

The spelling of 21431134586548 in words is "twenty-one trillion, four hundred thirty-one billion, one hundred thirty-four million, five hundred eighty-six thousand, five hundred forty-eight".