20440553293 has 2 divisors, whose sum is σ = 20440553294. Its totient is φ = 20440553292.

The previous prime is 20440553233. The next prime is 20440553369. The reversal of 20440553293 is 39235504402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20436703849 + 3849444 = 142957^2 + 1962^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440553293 - 2¹⁷ = 20440422221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440553233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220276646 + 10220276647.

It is an arithmetic number, because the mean of its divisors is an integer number (10220276647).

Almost surely, 2^20440553293 is an apocalyptic number.

It is an amenable number.

20440553293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440553293 is an equidigital number, since it uses as much as digits as its factorization.

20440553293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20440553293 in words is "twenty billion, four hundred forty million, five hundred fifty-three thousand, two hundred ninety-three".