20413623 has 8 divisors (see below), whose sum is σ = 27240048. Its totient is φ = 13598144.

The previous prime is 20413621. The next prime is 20413633. The reversal of 20413623 is 32631402.

It is a happy number.

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 20413623 - 2¹ = 20413621 is a prime.

It is a super-2 number, since 2×20413623² = 833432007972258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20413623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3961 + ... + 7517.

It is an arithmetic number, because the mean of its divisors is an integer number (3405006).

Almost surely, 2^20413623 is an apocalyptic number.

20413623 is a deficient number, since it is larger than the sum of its proper divisors (6826425).

20413623 is a wasteful number, since it uses less digits than its factorization.

20413623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5473.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20413623 is about 4518.1437560131. The cubic root of 20413623 is about 273.3002506394.

The spelling of 20413623 in words is "twenty million, four hundred thirteen thousand, six hundred twenty-three".