20356051 has 2 divisors, whose sum is σ = 20356052. Its totient is φ = 20356050.

The previous prime is 20356043. The next prime is 20356069. The reversal of 20356051 is 15065302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20356051 - 2³ = 20356043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20356751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178025 + 10178026.

It is an arithmetic number, because the mean of its divisors is an integer number (10178026).

Almost surely, 2^20356051 is an apocalyptic number.

20356051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20356051 is an equidigital number, since it uses as much as digits as its factorization.

20356051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20356051 is about 4511.7680569817. The cubic root of 20356051 is about 273.0430815738.

The spelling of 20356051 in words is "twenty million, three hundred fifty-six thousand, fifty-one".