20349691337 has 2 divisors, whose sum is σ = 20349691338. Its totient is φ = 20349691336.

The previous prime is 20349691333. The next prime is 20349691361. The reversal of 20349691337 is 73319694302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19355487376 + 994203961 = 139124^2 + 31531^2 .

It is a cyclic number.

It is not a de Polignac number, because 20349691337 - 2² = 20349691333 is a prime.

It is a super-2 number, since 2×20349691337² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20349691291 and 20349691300.

It is not a weakly prime, because it can be changed into another prime (20349691333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10174845668 + 10174845669.

It is an arithmetic number, because the mean of its divisors is an integer number (10174845669).

Almost surely, 2^20349691337 is an apocalyptic number.

It is an amenable number.

20349691337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20349691337 is an equidigital number, since it uses as much as digits as its factorization.

20349691337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 47.

The spelling of 20349691337 in words is "twenty billion, three hundred forty-nine million, six hundred ninety-one thousand, three hundred thirty-seven".