20246751130321 has 9 divisors (see below), whose sum is σ = 20686914723099. Its totient is φ = 19815762207984.

The previous prime is 20246751130313. The next prime is 20246751130343. The reversal of 20246751130321 is 12303115764202.

The square root of 20246751130321 is 4499639.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 20030771580625 + 215979549696 = 4475575^2 + 464736^2 .

It is not a de Polignac number, because 20246751130321 - 2³ = 20246751130313 is a prime.

It is a super-2 number, since 2×20246751130321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20246751130301) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 211435165 + ... + 211530901.

Almost surely, 2^{20246751130321} is an apocalyptic number.

20246751130321 is the 4499639-th square number.

20246751130321 is the 2249820-th centered octagonal number.

It is an amenable number.

20246751130321 is a deficient number, since it is larger than the sum of its proper divisors (440163592778).

20246751130321 is an frugal number, since it uses more digits than its factorization.

20246751130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191568 (or 95784 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 20246751130321 its reverse (12303115764202), we get a palindrome (32549866894523).

The spelling of 20246751130321 in words is "twenty trillion, two hundred forty-six billion, seven hundred fifty-one million, one hundred thirty thousand, three hundred twenty-one".