20345752465 has 16 divisors (see below), whose sum is σ = 25082139600. Its totient is φ = 15834055680.

The previous prime is 20345752447. The next prime is 20345752477. The reversal of 20345752465 is 56425754302.

It can be written as a sum of positive squares in 8 ways, for example, as 12988816 + 20332763649 = 3604^2 + 142593^2 .

It is not a de Polignac number, because 20345752465 - 2¹¹ = 20345750417 is a prime.

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, 70644 + ... + 213733.

It is an arithmetic number, because the mean of its divisors is an integer number (1567633725).

Almost surely, 2^20345752465 is an apocalyptic number.

It is an amenable number.

20345752465 is a deficient number, since it is larger than the sum of its proper divisors (4736387135).

20345752465 is a wasteful number, since it uses less digits than its factorization.

20345752465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284772.

The product of its (nonzero) digits is 1008000, while the sum is 43.

The spelling of 20345752465 in words is "twenty billion, three hundred forty-five million, seven hundred fifty-two thousand, four hundred sixty-five".