20162623 has 4 divisors (see below), whose sum is σ = 21713608. Its totient is φ = 18611640.

The previous prime is 20162587. The next prime is 20162633. The reversal of 20162623 is 32626102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20162623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20162594 and 20162603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20162633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775473 + ... + 775498.

It is an arithmetic number, because the mean of its divisors is an integer number (5428402).

Almost surely, 2^20162623 is an apocalyptic number.

20162623 is a deficient number, since it is larger than the sum of its proper divisors (1550985).

20162623 is a wasteful number, since it uses less digits than its factorization.

20162623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550984.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20162623 is about 4490.2809488940. The cubic root of 20162623 is about 272.1754877861.

Adding to 20162623 its reverse (32626102), we get a palindrome (52788725).

The spelling of 20162623 in words is "twenty million, one hundred sixty-two thousand, six hundred twenty-three".