20611023 has 8 divisors (see below), whose sum is σ = 27569328. Its totient is φ = 13696704.

The previous prime is 20611007. The next prime is 20611033. The reversal of 20611023 is 32011602.

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

It is not a de Polignac number, because 20611023 - 2⁴ = 20611007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20610993 and 20611011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611033) 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, 9886 + ... + 11787.

It is an arithmetic number, because the mean of its divisors is an integer number (3446166).

Almost surely, 2^20611023 is an apocalyptic number.

20611023 is a deficient number, since it is larger than the sum of its proper divisors (6958305).

20611023 is a wasteful number, since it uses less digits than its factorization.

20611023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21993.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20611023 is about 4539.9364532998. The cubic root of 20611023 is about 274.1783652259.

Adding to 20611023 its reverse (32011602), we get a palindrome (52622625).

The spelling of 20611023 in words is "twenty million, six hundred eleven thousand, twenty-three".