20482391 has 2 divisors, whose sum is σ = 20482392. Its totient is φ = 20482390.

The previous prime is 20482387. The next prime is 20482463. The reversal of 20482391 is 19328402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20482391 - 2² = 20482387 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20482291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10241195 + 10241196.

It is an arithmetic number, because the mean of its divisors is an integer number (10241196).

Almost surely, 2^20482391 is an apocalyptic number.

20482391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20482391 is an equidigital number, since it uses as much as digits as its factorization.

20482391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20482391 is about 4525.7475625580. The cubic root of 20482391 is about 273.6067983261.

The spelling of 20482391 in words is "twenty million, four hundred eighty-two thousand, three hundred ninety-one".