20620051 has 2 divisors, whose sum is σ = 20620052. Its totient is φ = 20620050.

The previous prime is 20620049. The next prime is 20620079. The reversal of 20620051 is 15002602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20620051 - 2¹ = 20620049 is a prime.

Together with 20620049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20620081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310025 + 10310026.

It is an arithmetic number, because the mean of its divisors is an integer number (10310026).

Almost surely, 2^20620051 is an apocalyptic number.

20620051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620051 is an equidigital number, since it uses as much as digits as its factorization.

20620051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20620051 is about 4540.9306314895. The cubic root of 20620051 is about 274.2183910729.

Adding to 20620051 its reverse (15002602), we get a palindrome (35622653).

The spelling of 20620051 in words is "twenty million, six hundred twenty thousand, fifty-one".