20245123 has 2 divisors, whose sum is σ = 20245124. Its totient is φ = 20245122.

The previous prime is 20245081. The next prime is 20245151. The reversal of 20245123 is 32154202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20245123 - 2²¹ = 18147971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20245123.

It is not a weakly prime, because it can be changed into another prime (20245223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122561 + 10122562.

It is an arithmetic number, because the mean of its divisors is an integer number (10122562).

Almost surely, 2^20245123 is an apocalyptic number.

20245123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20245123 is an equidigital number, since it uses as much as digits as its factorization.

20245123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20245123 is about 4499.4580784801. The cubic root of 20245123 is about 272.5462054466.

Adding to 20245123 its reverse (32154202), we get a palindrome (52399325).

The spelling of 20245123 in words is "twenty million, two hundred forty-five thousand, one hundred twenty-three".