20010111923 has 2 divisors, whose sum is σ = 20010111924. Its totient is φ = 20010111922.

The previous prime is 20010111887. The next prime is 20010111977. The reversal of 20010111923 is 32911101002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20010111923 - 2⁶ = 20010111859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010111895 and 20010111904.

It is not a weakly prime, because it can be changed into another prime (20010117923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005055961 + 10005055962.

It is an arithmetic number, because the mean of its divisors is an integer number (10005055962).

Almost surely, 2^20010111923 is an apocalyptic number.

20010111923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010111923 is an equidigital number, since it uses as much as digits as its factorization.

20010111923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 20010111923 its reverse (32911101002), we get a palindrome (52921212925).

The spelling of 20010111923 in words is "twenty billion, ten million, one hundred eleven thousand, nine hundred twenty-three".