20063621 has 8 divisors (see below), whose sum is σ = 21976920. Its totient is φ = 18231808.

The previous prime is 20063611. The next prime is 20063623. The reversal of 20063621 is 12636002.

It can be written as a sum of positive squares in 4 ways, for example, as 835396 + 19228225 = 914^2 + 4385^2 .

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 20063621 - 2⁶ = 20063557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20063593 and 20063602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20063623) 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, 19856 + ... + 20841.

It is an arithmetic number, because the mean of its divisors is an integer number (2747115).

Almost surely, 2^20063621 is an apocalyptic number.

It is an amenable number.

20063621 is a deficient number, since it is larger than the sum of its proper divisors (1913299).

20063621 is a wasteful number, since it uses less digits than its factorization.

20063621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40743.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20063621 is about 4479.2433512816. The cubic root of 20063621 is about 271.7292802763.

Adding to 20063621 its reverse (12636002), we get a palindrome (32699623).

The spelling of 20063621 in words is "twenty million, sixty-three thousand, six hundred twenty-one".