20010523 has 8 divisors (see below), whose sum is σ = 22051568. Its totient is φ = 18041184.

The previous prime is 20010517. The next prime is 20010533. The reversal of 20010523 is 32501002.

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 20010523 - 2⁵ = 20010491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010533) 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, 17340 + ... + 18457.

It is an arithmetic number, because the mean of its divisors is an integer number (2756446).

Almost surely, 2^20010523 is an apocalyptic number.

20010523 is a deficient number, since it is larger than the sum of its proper divisors (2041045).

20010523 is a wasteful number, since it uses less digits than its factorization.

20010523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35853.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20010523 is about 4473.3123074518. The cubic root of 20010523 is about 271.4893596735.

Adding to 20010523 its reverse (32501002), we get a palindrome (52511525).

The spelling of 20010523 in words is "twenty million, ten thousand, five hundred twenty-three".