21888673753 has 2 divisors, whose sum is σ = 21888673754. Its totient is φ = 21888673752.

The previous prime is 21888673733. The next prime is 21888673811. The reversal of 21888673753 is 35737688812.

It is an a-pointer prime, because the next prime (21888673811) can be obtained adding 21888673753 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21773068249 + 115605504 = 147557^2 + 10752^2 .

It is a cyclic number.

It is not a de Polignac number, because 21888673753 - 2²⁹ = 21351802841 is a prime.

It is a super-2 number, since 2×21888673753² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21888673733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10944336876 + 10944336877.

It is an arithmetic number, because the mean of its divisors is an integer number (10944336877).

Almost surely, 2^21888673753 is an apocalyptic number.

It is an amenable number.

21888673753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21888673753 is an equidigital number, since it uses as much as digits as its factorization.

21888673753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 58.

The spelling of 21888673753 in words is "twenty-one billion, eight hundred eighty-eight million, six hundred seventy-three thousand, seven hundred fifty-three".