21475143252293 has 8 divisors (see below), whose sum is σ = 22062619470360. Its totient is φ = 20888038978560.

The previous prime is 21475143252289. The next prime is 21475143252301. The reversal of 21475143252293 is 39225234157412.

It can be written as a sum of positive squares in 4 ways, for example, as 2561846732929 + 18913296519364 = 1600577^2 + 4348942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21475143252293 - 2² = 21475143252289 is a prime.

It is a super-2 number, since 2×21475143252293² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21475143254293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92869028 + ... + 93099981.

It is an arithmetic number, because the mean of its divisors is an integer number (2757827433795).

Almost surely, 2^{21475143252293} is an apocalyptic number.

It is an amenable number.

21475143252293 is a deficient number, since it is larger than the sum of its proper divisors (587476218067).

21475143252293 is a wasteful number, since it uses less digits than its factorization.

21475143252293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185972167.

The product of its digits is 3628800, while the sum is 50.

The spelling of 21475143252293 in words is "twenty-one trillion, four hundred seventy-five billion, one hundred forty-three million, two hundred fifty-two thousand, two hundred ninety-three".