20449737479 has 2 divisors, whose sum is σ = 20449737480. Its totient is φ = 20449737478.

The previous prime is 20449737439. The next prime is 20449737499. The reversal of 20449737479 is 97473794402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20449737479 - 2²⁸ = 20181302023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20449737439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224868739 + 10224868740.

It is an arithmetic number, because the mean of its divisors is an integer number (10224868740).

Almost surely, 2^20449737479 is an apocalyptic number.

20449737479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20449737479 is an equidigital number, since it uses as much as digits as its factorization.

20449737479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10668672, while the sum is 56.

The spelling of 20449737479 in words is "twenty billion, four hundred forty-nine million, seven hundred thirty-seven thousand, four hundred seventy-nine".