21476574130345 has 4 divisors (see below), whose sum is σ = 25771888956420. Its totient is φ = 17181259304272.

The previous prime is 21476574130343. The next prime is 21476574130351. The reversal of 21476574130345 is 54303147567412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4937581752489 + 16538992377856 = 2222067^2 + 4066816^2 .

It is a cyclic number.

It is not a de Polignac number, because 21476574130345 - 2¹ = 21476574130343 is a prime.

It is a super-2 number, since 2×21476574130345² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21476574130292 and 21476574130301.

It is not an unprimeable number, because it can be changed into a prime (21476574130343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147657413030 + ... + 2147657413039.

It is an arithmetic number, because the mean of its divisors is an integer number (6442972239105).

Almost surely, 2^{21476574130345} is an apocalyptic number.

It is an amenable number.

21476574130345 is a deficient number, since it is larger than the sum of its proper divisors (4295314826075).

21476574130345 is an equidigital number, since it uses as much as digits as its factorization.

21476574130345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295314826074.

The product of its (nonzero) digits is 8467200, while the sum is 52.

The spelling of 21476574130345 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred seventy-four million, one hundred thirty thousand, three hundred forty-five".