20763839 has 2 divisors, whose sum is σ = 20763840. Its totient is φ = 20763838.

The previous prime is 20763829. The next prime is 20763881. The reversal of 20763839 is 93836702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20763839 - 2⁴ = 20763823 is a prime.

It is a super-2 number, since 2×20763839² = 862274020035842, which contains 22 as substring.

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 (20763829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381919 + 10381920.

It is an arithmetic number, because the mean of its divisors is an integer number (10381920).

Almost surely, 2^20763839 is an apocalyptic number.

20763839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20763839 is an equidigital number, since it uses as much as digits as its factorization.

20763839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20763839 is about 4556.7355639756. The cubic root of 20763839 is about 274.8543096062.

It can be divided in two parts, 207 and 63839, that added together give a palindrome (64046).

The spelling of 20763839 in words is "twenty million, seven hundred sixty-three thousand, eight hundred thirty-nine".