21675816869139 has 12 divisors (see below), whose sum is σ = 31322618984800. Its totient is φ = 14444495781264.

The previous prime is 21675816869101. The next prime is 21675816869183. The reversal of 21675816869139 is 93196861857612.

21675816869139 is a `hidden beast` number, since 2 + 1 + 6 + 7 + 581 + 6 + 8 + 6 + 9 + 1 + 39 = 666.

It is not a de Polignac number, because 21675816869139 - 2¹⁷ = 21675816738067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21675815869139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 504043819 + ... + 504086820.

Almost surely, 2^{21675816869139} is an apocalyptic number.

21675816869139 is a deficient number, since it is larger than the sum of its proper divisors (9646802115661).

21675816869139 is a wasteful number, since it uses less digits than its factorization.

21675816869139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008133034 (or 1008133031 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The spelling of 21675816869139 in words is "twenty-one trillion, six hundred seventy-five billion, eight hundred sixteen million, eight hundred sixty-nine thousand, one hundred thirty-nine".