20876047 has 2 divisors, whose sum is σ = 20876048. Its totient is φ = 20876046.

The previous prime is 20875991. The next prime is 20876057. The reversal of 20876047 is 74067802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20876047 - 2⁷ = 20875919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20876057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10438023 + 10438024.

It is an arithmetic number, because the mean of its divisors is an integer number (10438024).

Almost surely, 2^20876047 is an apocalyptic number.

20876047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20876047 is an equidigital number, since it uses as much as digits as its factorization.

20876047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20876047 is about 4569.0312977698. The cubic root of 20876047 is about 275.3485255971.

The spelling of 20876047 in words is "twenty million, eight hundred seventy-six thousand, forty-seven".