20000315621 has 16 divisors (see below), whose sum is σ = 23526054720. Its totient is φ = 16762638720.

The previous prime is 20000315603. The next prime is 20000315723. The reversal of 20000315621 is 12651300002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000315621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000315593 and 20000315602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000345621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29246 + ... + 202128.

It is an arithmetic number, because the mean of its divisors is an integer number (1470378420).

Almost surely, 2^20000315621 is an apocalyptic number.

It is an amenable number.

20000315621 is a deficient number, since it is larger than the sum of its proper divisors (3525739099).

20000315621 is a wasteful number, since it uses less digits than its factorization.

20000315621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173716.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 20000315621 its reverse (12651300002), we get a palindrome (32651615623).

The spelling of 20000315621 in words is "twenty billion, three hundred fifteen thousand, six hundred twenty-one".