20924965745 has 16 divisors (see below), whose sum is σ = 25960392192. Its totient is φ = 16174702080.

The previous prime is 20924965741. The next prime is 20924965751. The reversal of 20924965745 is 54756942902.

It is not a de Polignac number, because 20924965745 - 2² = 20924965741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20924965741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5312 + ... + 204641.

It is an arithmetic number, because the mean of its divisors is an integer number (1622524512).

Almost surely, 2^20924965745 is an apocalyptic number.

It is an amenable number.

20924965745 is a deficient number, since it is larger than the sum of its proper divisors (5035426447).

20924965745 is a wasteful number, since it uses less digits than its factorization.

20924965745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210632.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 20924965745 in words is "twenty billion, nine hundred twenty-four million, nine hundred sixty-five thousand, seven hundred forty-five".