20470453477 has 2 divisors, whose sum is σ = 20470453478. Its totient is φ = 20470453476.

The previous prime is 20470453441. The next prime is 20470453499. The reversal of 20470453477 is 77435407402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15916093281 + 4554360196 = 126159^2 + 67486^2 .

It is a cyclic number.

It is not a de Polignac number, because 20470453477 - 2⁷ = 20470453349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20470453777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10235226738 + 10235226739.

It is an arithmetic number, because the mean of its divisors is an integer number (10235226739).

Almost surely, 2^20470453477 is an apocalyptic number.

It is an amenable number.

20470453477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20470453477 is an equidigital number, since it uses as much as digits as its factorization.

20470453477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 43.

The spelling of 20470453477 in words is "twenty billion, four hundred seventy million, four hundred fifty-three thousand, four hundred seventy-seven".