21465348345 has 96 divisors (see below), whose sum is σ = 44509630464. Its totient is φ = 9356688000.

The previous prime is 21465348343. The next prime is 21465348353. The reversal of 21465348345 is 54384356412.

21465348345 is a `hidden beast` number, since 214 + 6 + 53 + 48 + 345 = 666.

It is not a de Polignac number, because 21465348345 - 2¹ = 21465348343 is a prime.

It is a super-2 number, since 2×21465348345² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21465348345.

It is not an unprimeable number, because it can be changed into a prime (21465348341) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2393620 + ... + 2402570.

It is an arithmetic number, because the mean of its divisors is an integer number (463641984).

Almost surely, 2^21465348345 is an apocalyptic number.

It is an amenable number.

21465348345 is an abundant number, since it is smaller than the sum of its proper divisors (23044282119).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21465348345 is a wasteful number, since it uses less digits than its factorization.

21465348345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323 (or 9320 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 21465348345 in words is "twenty-one billion, four hundred sixty-five million, three hundred forty-eight thousand, three hundred forty-five".