20862983 has 2 divisors, whose sum is σ = 20862984. Its totient is φ = 20862982.

The previous prime is 20862979. The next prime is 20862997. The reversal of 20862983 is 38926802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20862983 - 2² = 20862979 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20862913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10431491 + 10431492.

It is an arithmetic number, because the mean of its divisors is an integer number (10431492).

Almost surely, 2^20862983 is an apocalyptic number.

20862983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20862983 is an equidigital number, since it uses as much as digits as its factorization.

20862983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 20862983 is about 4567.6014493386. The cubic root of 20862983 is about 275.2910769215.

The spelling of 20862983 in words is "twenty million, eight hundred sixty-two thousand, nine hundred eighty-three".