20203123 has 12 divisors (see below), whose sum is σ = 21882960. Its totient is φ = 18641792.

The previous prime is 20203093. The next prime is 20203129. The reversal of 20203123 is 32130202.

It is a happy number.

It is not a de Polignac number, because 20203123 - 2¹³ = 20194931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14658 + ... + 15976.

It is an arithmetic number, because the mean of its divisors is an integer number (1823580).

Almost surely, 2^20203123 is an apocalyptic number.

20203123 is a deficient number, since it is larger than the sum of its proper divisors (1679837).

20203123 is a wasteful number, since it uses less digits than its factorization.

20203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1389 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20203123 is about 4494.7884266114. The cubic root of 20203123 is about 272.3576025651.

Adding to 20203123 its reverse (32130202), we get a palindrome (52333325).

The spelling of 20203123 in words is "twenty million, two hundred three thousand, one hundred twenty-three".