21773134450143 has 24 divisors (see below), whose sum is σ = 31688572930560. Its totient is φ = 14405431375440.

The previous prime is 21773134450127. The next prime is 21773134450183. The reversal of 21773134450143 is 34105443137712.

21773134450143 is a `hidden beast` number, since 2 + 1 + 7 + 7 + 3 + 134 + 4 + 501 + 4 + 3 = 666.

It is not a de Polignac number, because 21773134450143 - 2⁴ = 21773134450127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21773134450103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117321 + ... + 6600002.

It is an arithmetic number, because the mean of its divisors is an integer number (1320357205440).

Almost surely, 2^{21773134450143} is an apocalyptic number.

21773134450143 is a deficient number, since it is larger than the sum of its proper divisors (9915438480417).

21773134450143 is a wasteful number, since it uses less digits than its factorization.

21773134450143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720059 (or 6720056 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

Adding to 21773134450143 its reverse (34105443137712), we get a palindrome (55878577587855).

The spelling of 21773134450143 in words is "twenty-one trillion, seven hundred seventy-three billion, one hundred thirty-four million, four hundred fifty thousand, one hundred forty-three".