20494632623 has 2 divisors, whose sum is σ = 20494632624. Its totient is φ = 20494632622.

The previous prime is 20494632569. The next prime is 20494632643. The reversal of 20494632623 is 32623649402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20494632623 - 2²⁰ = 20493584047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20494632643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10247316311 + 10247316312.

It is an arithmetic number, because the mean of its divisors is an integer number (10247316312).

Almost surely, 2^20494632623 is an apocalyptic number.

20494632623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20494632623 is an equidigital number, since it uses as much as digits as its factorization.

20494632623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 41.

The spelling of 20494632623 in words is "twenty billion, four hundred ninety-four million, six hundred thirty-two thousand, six hundred twenty-three".