20730547144465 has 8 divisors (see below), whose sum is σ = 24876722830248. Its totient is φ = 16584393544320.

The previous prime is 20730547144457. The next prime is 20730547144507. The reversal of 20730547144465 is 56444174503702.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5022063072016 + 15708484072449 = 2240996^2 + 3963393^2 .

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

It is not a de Polignac number, because 20730547144465 - 2³ = 20730547144457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3380956 + ... + 7272685.

It is an arithmetic number, because the mean of its divisors is an integer number (3109590353781).

Almost surely, 2^{20730547144465} is an apocalyptic number.

It is an amenable number.

20730547144465 is a deficient number, since it is larger than the sum of its proper divisors (4146175685783).

20730547144465 is a wasteful number, since it uses less digits than its factorization.

20730547144465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042819.

The product of its (nonzero) digits is 11289600, while the sum is 52.

The spelling of 20730547144465 in words is "twenty trillion, seven hundred thirty billion, five hundred forty-seven million, one hundred forty-four thousand, four hundred sixty-five".