21373577505465 has 8 divisors (see below), whose sum is σ = 34197724008768. Its totient is φ = 11399241336240.

The previous prime is 21373577505461. The next prime is 21373577505487. The reversal of 21373577505465 is 56450577537312.

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

It is not a de Polignac number, because 21373577505465 - 2² = 21373577505461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21373577505399 and 21373577505408.

It is not an unprimeable number, because it can be changed into a prime (21373577505461) 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, 712452583501 + ... + 712452583530.

It is an arithmetic number, because the mean of its divisors is an integer number (4274715501096).

Almost surely, 2^{21373577505465} is an apocalyptic number.

It is an amenable number.

21373577505465 is a deficient number, since it is larger than the sum of its proper divisors (12824146503303).

21373577505465 is a wasteful number, since it uses less digits than its factorization.

21373577505465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424905167039.

The product of its (nonzero) digits is 92610000, while the sum is 60.

The spelling of 21373577505465 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred seventy-seven million, five hundred five thousand, four hundred sixty-five".