20424615635623 has 2 divisors, whose sum is σ = 20424615635624. Its totient is φ = 20424615635622.

The previous prime is 20424615635573. The next prime is 20424615635657. The reversal of 20424615635623 is 32653651642402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424615635623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424615633623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212307817811 + 10212307817812.

It is an arithmetic number, because the mean of its divisors is an integer number (10212307817812).

Almost surely, 2^{20424615635623} is an apocalyptic number.

20424615635623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424615635623 is an equidigital number, since it uses as much as digits as its factorization.

20424615635623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 20424615635623 in words is "twenty trillion, four hundred twenty-four billion, six hundred fifteen million, six hundred thirty-five thousand, six hundred twenty-three".