20031537349 has 2 divisors, whose sum is σ = 20031537350. Its totient is φ = 20031537348.

The previous prime is 20031537347. The next prime is 20031537367. The reversal of 20031537349 is 94373513002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11541204900 + 8490332449 = 107430^2 + 92143^2 .

It is a cyclic number.

It is not a de Polignac number, because 20031537349 - 2¹ = 20031537347 is a prime.

Together with 20031537347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20031537347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015768674 + 10015768675.

It is an arithmetic number, because the mean of its divisors is an integer number (10015768675).

Almost surely, 2^20031537349 is an apocalyptic number.

It is an amenable number.

20031537349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031537349 is an equidigital number, since it uses as much as digits as its factorization.

20031537349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 37.

The spelling of 20031537349 in words is "twenty billion, thirty-one million, five hundred thirty-seven thousand, three hundred forty-nine".