20463662545 has 8 divisors (see below), whose sum is σ = 24560536680. Its totient is φ = 16368168960.

The previous prime is 20463662539. The next prime is 20463662623. The reversal of 20463662545 is 54526636402.

It can be written as a sum of positive squares in 4 ways, for example, as 1089528064 + 19374134481 = 33008^2 + 139191^2 .

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

It is not a de Polignac number, because 20463662545 - 2⁹ = 20463662033 is a prime.

It is a super-2 number, since 2×20463662545² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312240 + ... + 372049.

It is an arithmetic number, because the mean of its divisors is an integer number (3070067085).

Almost surely, 2^20463662545 is an apocalyptic number.

It is an amenable number.

20463662545 is a deficient number, since it is larger than the sum of its proper divisors (4096874135).

20463662545 is an equidigital number, since it uses as much as digits as its factorization.

20463662545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690275.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 20463662545 in words is "twenty billion, four hundred sixty-three million, six hundred sixty-two thousand, five hundred forty-five".