20473474249 has 2 divisors, whose sum is σ = 20473474250. Its totient is φ = 20473474248.

The previous prime is 20473474247. The next prime is 20473474279. The reversal of 20473474249 is 94247437402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19443513600 + 1029960649 = 139440^2 + 32093^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473474249 - 2¹ = 20473474247 is a prime.

It is a super-2 number, since 2×20473474249² (a number of 21 digits) contains 22 as substring.

Together with 20473474247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20473474199 and 20473474208.

It is not a weakly prime, because it can be changed into another prime (20473474247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236737124 + 10236737125.

It is an arithmetic number, because the mean of its divisors is an integer number (10236737125).

Almost surely, 2^20473474249 is an apocalyptic number.

It is an amenable number.

20473474249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473474249 is an equidigital number, since it uses as much as digits as its factorization.

20473474249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 20473474249 in words is "twenty billion, four hundred seventy-three million, four hundred seventy-four thousand, two hundred forty-nine".