20523653707 has 2 divisors, whose sum is σ = 20523653708. Its totient is φ = 20523653706.

The previous prime is 20523653677. The next prime is 20523653737. The reversal of 20523653707 is 70735632502.

It is a balanced prime because it is at equal distance from previous prime (20523653677) and next prime (20523653737).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20523653707 is a prime.

It is a super-2 number, since 2×20523653707² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20523653707.

It is not a weakly prime, because it can be changed into another prime (20523653737) 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 as a sum of consecutive naturals, namely, 10261826853 + 10261826854.

It is an arithmetic number, because the mean of its divisors is an integer number (10261826854).

Almost surely, 2^20523653707 is an apocalyptic number.

20523653707 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523653707 is an equidigital number, since it uses as much as digits as its factorization.

20523653707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 40.

The spelling of 20523653707 in words is "twenty billion, five hundred twenty-three million, six hundred fifty-three thousand, seven hundred seven".