20002523 has 8 divisors (see below), whose sum is σ = 21224592. Its totient is φ = 18785536.

The previous prime is 20002487. The next prime is 20002529. The reversal of 20002523 is 32520002.

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 20002523 - 2¹² = 19998427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002498 and 20002507.

It is not an unprimeable number, because it can be changed into a prime (20002529) 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, 9536 + ... + 11442.

It is an arithmetic number, because the mean of its divisors is an integer number (2653074).

Almost surely, 2^20002523 is an apocalyptic number.

20002523 is a deficient number, since it is larger than the sum of its proper divisors (1222069).

20002523 is a wasteful number, since it uses less digits than its factorization.

20002523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20002523 is about 4472.4180260794. The cubic root of 20002523 is about 271.4531753056.

Adding to 20002523 its reverse (32520002), we get a palindrome (52522525).

The spelling of 20002523 in words is "twenty million, two thousand, five hundred twenty-three".