20332747 has 2 divisors, whose sum is σ = 20332748. Its totient is φ = 20332746.

The previous prime is 20332733. The next prime is 20332771. The reversal of 20332747 is 74723302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20332747 - 2²³ = 11944139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20332727) 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, 10166373 + 10166374.

It is an arithmetic number, because the mean of its divisors is an integer number (10166374).

Almost surely, 2^20332747 is an apocalyptic number.

20332747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20332747 is an equidigital number, since it uses as much as digits as its factorization.

20332747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 20332747 is about 4509.1847378434. The cubic root of 20332747 is about 272.9388467907.

The spelling of 20332747 in words is "twenty million, three hundred thirty-two thousand, seven hundred forty-seven".