20100623 has 8 divisors (see below), whose sum is σ = 20482608. Its totient is φ = 19721664.

The previous prime is 20100611. The next prime is 20100629. The reversal of 20100623 is 32600102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20100623 - 2⁶ = 20100559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100598 and 20100607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100629) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15965 + ... + 17177.

It is an arithmetic number, because the mean of its divisors is an integer number (2560326).

Almost surely, 2^20100623 is an apocalyptic number.

20100623 is a deficient number, since it is larger than the sum of its proper divisors (381985).

20100623 is a wasteful number, since it uses less digits than its factorization.

20100623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20100623 is about 4483.3718337876. The cubic root of 20100623 is about 271.8962217635.

Adding to 20100623 its reverse (32600102), we get a palindrome (52700725).

The spelling of 20100623 in words is "twenty million, one hundred thousand, six hundred twenty-three".