20466663557145 has 32 divisors (see below), whose sum is σ = 35265856289664. Its totient is φ = 10075832870400.

The previous prime is 20466663557129. The next prime is 20466663557161. The reversal of 20466663557145 is 54175536666402.

It is an interprime number because it is at equal distance from previous prime (20466663557129) and next prime (20466663557161).

It is not a de Polignac number, because 20466663557145 - 2⁴ = 20466663557129 is a prime.

It is a super-2 number, since 2×20466663557145² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53459805 + ... + 53841285.

It is an arithmetic number, because the mean of its divisors is an integer number (1102058009052).

Almost surely, 2^{20466663557145} is an apocalyptic number.

It is an amenable number.

20466663557145 is a deficient number, since it is larger than the sum of its proper divisors (14799192732519).

20466663557145 is a wasteful number, since it uses less digits than its factorization.

20466663557145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656633.

The product of its (nonzero) digits is 108864000, while the sum is 60.

The spelling of 20466663557145 in words is "twenty trillion, four hundred sixty-six billion, six hundred sixty-three million, five hundred fifty-seven thousand, one hundred forty-five".