21158236133144 has 16 divisors (see below), whose sum is σ = 43278210272520. Its totient is φ = 9617380060480.

The previous prime is 21158236133107. The next prime is 21158236133183. The reversal of 21158236133144 is 44133163285112.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 21158236133095 and 21158236133104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120217250669 + ... + 120217250844.

Almost surely, 2^{21158236133144} is an apocalyptic number.

It is an amenable number.

21158236133144 is an abundant number, since it is smaller than the sum of its proper divisors (22119974139376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21158236133144 is a wasteful number, since it uses less digits than its factorization.

21158236133144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240434501530 (or 240434501526 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 21158236133144 in words is "twenty-one trillion, one hundred fifty-eight billion, two hundred thirty-six million, one hundred thirty-three thousand, one hundred forty-four".