21138743145003 has 16 divisors (see below), whose sum is σ = 30971695337856. Its totient is φ = 12717845906240.

The previous prime is 21138743144963. The next prime is 21138743145029. The reversal of 21138743145003 is 30054134783112.

It is a cyclic number.

It is not a de Polignac number, because 21138743145003 - 2¹⁷ = 21138743013931 is a prime.

It is a super-2 number, since 2×21138743145003² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21138743145073) 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, 2337834801 + ... + 2337843842.

It is an arithmetic number, because the mean of its divisors is an integer number (1935730958616).

Almost surely, 2^{21138743145003} is an apocalyptic number.

21138743145003 is a deficient number, since it is larger than the sum of its proper divisors (9832952192853).

21138743145003 is a wasteful number, since it uses less digits than its factorization.

21138743145003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675678794.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 21138743145003 in words is "twenty-one trillion, one hundred thirty-eight billion, seven hundred forty-three million, one hundred forty-five thousand, three".