20102423923 has 2 divisors, whose sum is σ = 20102423924. Its totient is φ = 20102423922.

The previous prime is 20102423921. The next prime is 20102423989. The reversal of 20102423923 is 32932420102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20102423923 - 2¹ = 20102423921 is a prime.

Together with 20102423921, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20102423891 and 20102423900.

It is not a weakly prime, because it can be changed into another prime (20102423921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051211961 + 10051211962.

It is an arithmetic number, because the mean of its divisors is an integer number (10051211962).

Almost surely, 2^20102423923 is an apocalyptic number.

20102423923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102423923 is an equidigital number, since it uses as much as digits as its factorization.

20102423923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 20102423923 in words is "twenty billion, one hundred two million, four hundred twenty-three thousand, nine hundred twenty-three".