20616473 has 2 divisors, whose sum is σ = 20616474. Its totient is φ = 20616472.

The previous prime is 20616451. The next prime is 20616493. The reversal of 20616473 is 37461602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14047504 + 6568969 = 3748^2 + 2563^2 .

It is a cyclic number.

It is not a de Polignac number, because 20616473 - 2¹² = 20612377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20616413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10308236 + 10308237.

It is an arithmetic number, because the mean of its divisors is an integer number (10308237).

Almost surely, 2^20616473 is an apocalyptic number.

It is an amenable number.

20616473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20616473 is an equidigital number, since it uses as much as digits as its factorization.

20616473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20616473 is about 4540.5366422924. The cubic root of 20616473 is about 274.2025293249.

The spelling of 20616473 in words is "twenty million, six hundred sixteen thousand, four hundred seventy-three".