20528051 has 2 divisors, whose sum is σ = 20528052. Its totient is φ = 20528050.

The previous prime is 20528041. The next prime is 20528069. The reversal of 20528051 is 15082502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20528051 - 2¹⁰ = 20527027 is a prime.

It is equal to p_1301945 and since 20528051 and 1301945 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20528041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10264025 + 10264026.

It is an arithmetic number, because the mean of its divisors is an integer number (10264026).

Almost surely, 2^20528051 is an apocalyptic number.

20528051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20528051 is an equidigital number, since it uses as much as digits as its factorization.

20528051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 20528051 is about 4530.7892248481. The cubic root of 20528051 is about 273.8099584407.

Subtracting from 20528051 its sum of digits (23), we obtain a triangular number (20528028 = T₆₄₀₇).

The spelling of 20528051 in words is "twenty million, five hundred twenty-eight thousand, fifty-one".