20303507745 has 24 divisors (see below), whose sum is σ = 37262909736. Its totient is φ = 10191564288.

The previous prime is 20303507737. The next prime is 20303507771. The reversal of 20303507745 is 54770530302.

It can be written as a sum of positive squares in 4 ways, for example, as 5272502544 + 15031005201 = 72612^2 + 122601^2 .

It is not a de Polignac number, because 20303507745 - 2³ = 20303507737 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 13269502 + ... + 13271031.

It is an arithmetic number, because the mean of its divisors is an integer number (1552621239).

Almost surely, 2^20303507745 is an apocalyptic number.

It is an amenable number.

20303507745 is a deficient number, since it is larger than the sum of its proper divisors (16959401991).

20303507745 is a wasteful number, since it uses less digits than its factorization.

20303507745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26540561 (or 26540558 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 36.

The spelling of 20303507745 in words is "twenty billion, three hundred three million, five hundred seven thousand, seven hundred forty-five".