20541023 has 2 divisors, whose sum is σ = 20541024. Its totient is φ = 20541022.

The previous prime is 20541013. The next prime is 20541043. The reversal of 20541023 is 32014502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20541023 - 2¹² = 20536927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20540992 and 20541010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20541013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270511 + 10270512.

It is an arithmetic number, because the mean of its divisors is an integer number (10270512).

Almost surely, 2^20541023 is an apocalyptic number.

20541023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541023 is an equidigital number, since it uses as much as digits as its factorization.

20541023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20541023 is about 4532.2205374408. The cubic root of 20541023 is about 273.8676212437.

Adding to 20541023 its reverse (32014502), we get a palindrome (52555525).

The spelling of 20541023 in words is "twenty million, five hundred forty-one thousand, twenty-three".