20251051 has 2 divisors, whose sum is σ = 20251052. Its totient is φ = 20251050.

The previous prime is 20251043. The next prime is 20251061. The reversal of 20251051 is 15015202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20251051 - 2³ = 20251043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20251061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10125525 + 10125526.

It is an arithmetic number, because the mean of its divisors is an integer number (10125526).

Almost surely, 2^20251051 is an apocalyptic number.

20251051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20251051 is an equidigital number, since it uses as much as digits as its factorization.

20251051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 20251051 is about 4500.1167762626. The cubic root of 20251051 is about 272.5728043833.

Adding to 20251051 its reverse (15015202), we get a palindrome (35266253).

The spelling of 20251051 in words is "twenty million, two hundred fifty-one thousand, fifty-one".