20102123623 has 2 divisors, whose sum is σ = 20102123624. Its totient is φ = 20102123622.

The previous prime is 20102123611. The next prime is 20102123651. The reversal of 20102123623 is 32632120102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20102123623 - 2¹³ = 20102115431 is a prime.

It is a super-2 number, since 2×20102123623² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102123594 and 20102123603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102123323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051061811 + 10051061812.

It is an arithmetic number, because the mean of its divisors is an integer number (10051061812).

Almost surely, 2^20102123623 is an apocalyptic number.

20102123623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102123623 is an equidigital number, since it uses as much as digits as its factorization.

20102123623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20102123623 its reverse (32632120102), we get a palindrome (52734243725).

The spelling of 20102123623 in words is "twenty billion, one hundred two million, one hundred twenty-three thousand, six hundred twenty-three".