20302907747 has 4 divisors (see below), whose sum is σ = 21497196456. Its totient is φ = 19108619040.

The previous prime is 20302907731. The next prime is 20302907771. The reversal of 20302907747 is 74770920302.

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

It is a cyclic number.

It is not a de Polignac number, because 20302907747 - 2⁴ = 20302907731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20302907347) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 597144329 + ... + 597144362.

It is an arithmetic number, because the mean of its divisors is an integer number (5374299114).

Almost surely, 2^20302907747 is an apocalyptic number.

20302907747 is a deficient number, since it is larger than the sum of its proper divisors (1194288709).

20302907747 is a wasteful number, since it uses less digits than its factorization.

20302907747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194288708.

The product of its (nonzero) digits is 148176, while the sum is 41.

The spelling of 20302907747 in words is "twenty billion, three hundred two million, nine hundred seven thousand, seven hundred forty-seven".