21501420011433 has 6 divisors (see below), whose sum is σ = 31057606683194. Its totient is φ = 14334280007616.

The previous prime is 21501420011419. The next prime is 21501420011443. The reversal of 21501420011433 is 33411002410512.

21501420011433 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 14 + 200 + 11 + 433 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20520791280144 + 980628731289 = 4529988^2 + 990267^2 .

It is not a de Polignac number, because 21501420011433 - 2⁶ = 21501420011369 is a prime.

It is a super-2 number, since 2×21501420011433² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21501420011397 and 21501420011406.

It is not an unprimeable number, because it can be changed into a prime (21501420011443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1194523333960 + ... + 1194523333977.

Almost surely, 2^{21501420011433} is an apocalyptic number.

It is an amenable number.

21501420011433 is a deficient number, since it is larger than the sum of its proper divisors (9556186671761).

21501420011433 is a wasteful number, since it uses less digits than its factorization.

21501420011433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389046667943 (or 2389046667940 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21501420011433 its reverse (33411002410512), we get a palindrome (54912422421945).

The spelling of 21501420011433 in words is "twenty-one trillion, five hundred one billion, four hundred twenty million, eleven thousand, four hundred thirty-three".