20751168923 has 2 divisors, whose sum is σ = 20751168924. Its totient is φ = 20751168922.

The previous prime is 20751168871. The next prime is 20751168961. The reversal of 20751168923 is 32986115702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20751168923 - 2¹² = 20751164827 is a prime.

It is a super-2 number, since 2×20751168923² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20751168323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10375584461 + 10375584462.

It is an arithmetic number, because the mean of its divisors is an integer number (10375584462).

Almost surely, 2^20751168923 is an apocalyptic number.

20751168923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20751168923 is an equidigital number, since it uses as much as digits as its factorization.

20751168923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 20751168923 in words is "twenty billion, seven hundred fifty-one million, one hundred sixty-eight thousand, nine hundred twenty-three".