20403124 has 24 divisors (see below), whose sum is σ = 42215040. Its totient is φ = 8442336.

The previous prime is 20403121. The next prime is 20403133. The reversal of 20403124 is 42130402.

It is a junction number, because it is equal to n+sod(n) for n = 20403098 and 20403107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11752 + ... + 13375.

It is an arithmetic number, because the mean of its divisors is an integer number (1758960).

Almost surely, 2^20403124 is an apocalyptic number.

It is an amenable number.

20403124 is an abundant number, since it is smaller than the sum of its proper divisors (21811916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20403124 is a wasteful number, since it uses less digits than its factorization.

20403124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25167 (or 25165 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20403124 is about 4516.9817356283. The cubic root of 20403124 is about 273.2533886102.

Adding to 20403124 its reverse (42130402), we get a palindrome (62533526).

The spelling of 20403124 in words is "twenty million, four hundred three thousand, one hundred twenty-four".