20645014245 has 16 divisors (see below), whose sum is σ = 34468198272. Its totient is φ = 10531949120.

The previous prime is 20645014237. The next prime is 20645014259. The reversal of 20645014245 is 54241054602.

It is not a de Polignac number, because 20645014245 - 2³ = 20645014237 is a prime.

It is a super-2 number, since 2×20645014245² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 29919966 + ... + 29920655.

It is an arithmetic number, because the mean of its divisors is an integer number (2154262392).

Almost surely, 2^20645014245 is an apocalyptic number.

It is an amenable number.

20645014245 is a deficient number, since it is larger than the sum of its proper divisors (13823184027).

20645014245 is a wasteful number, since it uses less digits than its factorization.

20645014245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59840652.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 20645014245 its reverse (54241054602), we get a palindrome (74886068847).

The spelling of 20645014245 in words is "twenty billion, six hundred forty-five million, fourteen thousand, two hundred forty-five".