20883623 has 4 divisors (see below), whose sum is σ = 20902488. Its totient is φ = 20864760.

The previous prime is 20883619. The next prime is 20883631. The reversal of 20883623 is 32638802.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20883623 - 2² = 20883619 is a prime.

It is a super-2 number, since 2×20883623² = 872251419212258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20883623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20883323) 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, 7661 + ... + 10022.

It is an arithmetic number, because the mean of its divisors is an integer number (5225622).

Almost surely, 2^20883623 is an apocalyptic number.

20883623 is a deficient number, since it is larger than the sum of its proper divisors (18865).

20883623 is a wasteful number, since it uses less digits than its factorization.

20883623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18864.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20883623 is about 4569.8602823281. The cubic root of 20883623 is about 275.3818299249.

The spelling of 20883623 in words is "twenty million, eight hundred eighty-three thousand, six hundred twenty-three".