20732470477 has 2 divisors, whose sum is σ = 20732470478. Its totient is φ = 20732470476.

The previous prime is 20732470397. The next prime is 20732470529. The reversal of 20732470477 is 77407423702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18486753156 + 2245717321 = 135966^2 + 47389^2 .

It is a cyclic number.

It is not a de Polignac number, because 20732470477 - 2⁷ = 20732470349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20732476477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10366235238 + 10366235239.

It is an arithmetic number, because the mean of its divisors is an integer number (10366235239).

Almost surely, 2^20732470477 is an apocalyptic number.

It is an amenable number.

20732470477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20732470477 is an equidigital number, since it uses as much as digits as its factorization.

20732470477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460992, while the sum is 43.

The spelling of 20732470477 in words is "twenty billion, seven hundred thirty-two million, four hundred seventy thousand, four hundred seventy-seven".