21373463302545 has 16 divisors (see below), whose sum is σ = 34252966811520. Its totient is φ = 11380705252224.

The previous prime is 21373463302511. The next prime is 21373463302561. The reversal of 21373463302545 is 54520336437312.

It is not a de Polignac number, because 21373463302545 - 2³³ = 21364873367953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21373463302494 and 21373463302503.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1154688925 + ... + 1154707434.

It is an arithmetic number, because the mean of its divisors is an integer number (2140810425720).

Almost surely, 2^{21373463302545} is an apocalyptic number.

It is an amenable number.

21373463302545 is a deficient number, since it is larger than the sum of its proper divisors (12879503508975).

21373463302545 is a wasteful number, since it uses less digits than its factorization.

21373463302545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309396984.

The product of its (nonzero) digits is 5443200, while the sum is 48.

Adding to 21373463302545 its reverse (54520336437312), we get a palindrome (75893799739857).

The spelling of 21373463302545 in words is "twenty-one trillion, three hundred seventy-three billion, four hundred sixty-three million, three hundred two thousand, five hundred forty-five".