20276031749 has 2 divisors, whose sum is σ = 20276031750. Its totient is φ = 20276031748.

The previous prime is 20276031641. The next prime is 20276031791. The reversal of 20276031749 is 94713067202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15321983524 + 4954048225 = 123782^2 + 70385^2 .

It is a cyclic number.

It is not a de Polignac number, because 20276031749 - 2⁸ = 20276031493 is a prime.

It is a super-2 number, since 2×20276031749² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20276031049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138015874 + 10138015875.

It is an arithmetic number, because the mean of its divisors is an integer number (10138015875).

Almost surely, 2^20276031749 is an apocalyptic number.

It is an amenable number.

20276031749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276031749 is an equidigital number, since it uses as much as digits as its factorization.

20276031749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 20276031749 in words is "twenty billion, two hundred seventy-six million, thirty-one thousand, seven hundred forty-nine".