20620429 has 2 divisors, whose sum is σ = 20620430. Its totient is φ = 20620428.

The previous prime is 20620427. The next prime is 20620469. The reversal of 20620429 is 92402602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 1932100 = 4323^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 20620429 - 2¹ = 20620427 is a prime.

Together with 20620427, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20620423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310214 + 10310215.

It is an arithmetic number, because the mean of its divisors is an integer number (10310215).

Almost surely, 2^20620429 is an apocalyptic number.

It is an amenable number.

20620429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620429 is an equidigital number, since it uses as much as digits as its factorization.

20620429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20620429 is about 4540.9722527230. The cubic root of 20620429 is about 274.2200666898.

The spelling of 20620429 in words is "twenty million, six hundred twenty thousand, four hundred twenty-nine".