20123450 has 24 divisors (see below), whose sum is σ = 37994592. Its totient is φ = 7927920.

The previous prime is 20123443. The next prime is 20123479. The reversal of 20123450 is 5432102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (1583108).

Almost surely, 2^20123450 is an apocalyptic number.

20123450 is a deficient number, since it is larger than the sum of its proper divisors (17871142).

20123450 is a wasteful number, since it uses less digits than its factorization.

20123450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6086 (or 6081 counting only the distinct ones).

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

The square root of 20123450 is about 4485.9168516592. The cubic root of 20123450 is about 271.9991079123. Note that the first 3 decimals are identical.

Adding to 20123450 its reverse (5432102), we get a palindrome (25555552).

The spelling of 20123450 in words is "twenty million, one hundred twenty-three thousand, four hundred fifty".