20148433 has 2 divisors, whose sum is σ = 20148434. Its totient is φ = 20148432.

The previous prime is 20148431. The next prime is 20148449. The reversal of 20148433 is 33484102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16507969 + 3640464 = 4063^2 + 1908^2 .

It is a cyclic number.

It is not a de Polignac number, because 20148433 - 2¹ = 20148431 is a prime.

Together with 20148431, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20148398 and 20148407.

It is not a weakly prime, because it can be changed into another prime (20148431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10074216 + 10074217.

It is an arithmetic number, because the mean of its divisors is an integer number (10074217).

Almost surely, 2^20148433 is an apocalyptic number.

It is an amenable number.

20148433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20148433 is an equidigital number, since it uses as much as digits as its factorization.

20148433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20148433 is about 4488.7005914852. The cubic root of 20148433 is about 272.1116224751. Note that the first 3 decimals are identical.

The spelling of 20148433 in words is "twenty million, one hundred forty-eight thousand, four hundred thirty-three".