20368623629 has 2 divisors, whose sum is σ = 20368623630. Its totient is φ = 20368623628.

The previous prime is 20368623553. The next prime is 20368623647. The reversal of 20368623629 is 92632686302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20222262025 + 146361604 = 142205^2 + 12098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20368623629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20368623529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10184311814 + 10184311815.

It is an arithmetic number, because the mean of its divisors is an integer number (10184311815).

Almost surely, 2^20368623629 is an apocalyptic number.

It is an amenable number.

20368623629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20368623629 is an equidigital number, since it uses as much as digits as its factorization.

20368623629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 20368623629 in words is "twenty billion, three hundred sixty-eight million, six hundred twenty-three thousand, six hundred twenty-nine".