20150353021 has 2 divisors, whose sum is σ = 20150353022. Its totient is φ = 20150353020.

The previous prime is 20150353007. The next prime is 20150353033. The reversal of 20150353021 is 12035305102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11494841796 + 8655511225 = 107214^2 + 93035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20150353021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20150352983 and 20150353001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20150323021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075176510 + 10075176511.

It is an arithmetic number, because the mean of its divisors is an integer number (10075176511).

Almost surely, 2^20150353021 is an apocalyptic number.

It is an amenable number.

20150353021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20150353021 is an equidigital number, since it uses as much as digits as its factorization.

20150353021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 20150353021 its reverse (12035305102), we get a palindrome (32185658123).

The spelling of 20150353021 in words is "twenty billion, one hundred fifty million, three hundred fifty-three thousand, twenty-one".