20023454137 has 2 divisors, whose sum is σ = 20023454138. Its totient is φ = 20023454136.

The previous prime is 20023454107. The next prime is 20023454179. The reversal of 20023454137 is 73145432002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16614178816 + 3409275321 = 128896^2 + 58389^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023454137 - 2¹¹ = 20023452089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20023454099 and 20023454108.

It is not a weakly prime, because it can be changed into another prime (20023454107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011727068 + 10011727069.

It is an arithmetic number, because the mean of its divisors is an integer number (10011727069).

Almost surely, 2^20023454137 is an apocalyptic number.

It is an amenable number.

20023454137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023454137 is an equidigital number, since it uses as much as digits as its factorization.

20023454137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20023454137 its reverse (73145432002), we get a palindrome (93168886139).

The spelling of 20023454137 in words is "twenty billion, twenty-three million, four hundred fifty-four thousand, one hundred thirty-seven".