20074752545 has 4 divisors (see below), whose sum is σ = 24089703060. Its totient is φ = 16059802032.

The previous prime is 20074752541. The next prime is 20074752559. The reversal of 20074752545 is 54525747002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2157323809 + 17917428736 = 46447^2 + 133856^2 .

It is a cyclic number.

It is not a de Polignac number, because 20074752545 - 2² = 20074752541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20074752541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2007475250 + ... + 2007475259.

It is an arithmetic number, because the mean of its divisors is an integer number (6022425765).

Almost surely, 2^20074752545 is an apocalyptic number.

It is an amenable number.

20074752545 is a deficient number, since it is larger than the sum of its proper divisors (4014950515).

20074752545 is an equidigital number, since it uses as much as digits as its factorization.

20074752545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014950514.

The product of its (nonzero) digits is 392000, while the sum is 41.

The spelling of 20074752545 in words is "twenty billion, seventy-four million, seven hundred fifty-two thousand, five hundred forty-five".