20102123 has 8 divisors (see below), whose sum is σ = 20571600. Its totient is φ = 19637280.

The previous prime is 20102119. The next prime is 20102129. The reversal of 20102123 is 32120102.

It is a happy number.

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 20102123 - 2² = 20102119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102129) 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, 8528 + ... + 10626.

It is an arithmetic number, because the mean of its divisors is an integer number (2571450).

Almost surely, 2^20102123 is an apocalyptic number.

20102123 is a deficient number, since it is larger than the sum of its proper divisors (469477).

20102123 is a wasteful number, since it uses less digits than its factorization.

20102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20102123 is about 4483.5391154756. The cubic root of 20102123 is about 271.9029849733.

Adding to 20102123 its reverse (32120102), we get a palindrome (52222225).

The spelling of 20102123 in words is "twenty million, one hundred two thousand, one hundred twenty-three".