20769319 has 2 divisors, whose sum is σ = 20769320. Its totient is φ = 20769318.

The previous prime is 20769317. The next prime is 20769361. The reversal of 20769319 is 91396702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20769319 - 2¹ = 20769317 is a prime.

It is a super-2 number, since 2×20769319² = 862729223447522, which contains 22 as substring.

Together with 20769317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20769311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384659 + 10384660.

It is an arithmetic number, because the mean of its divisors is an integer number (10384660).

Almost surely, 2^20769319 is an apocalyptic number.

20769319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20769319 is an equidigital number, since it uses as much as digits as its factorization.

20769319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 20769319 is about 4557.3368319667. The cubic root of 20769319 is about 274.8784873627.

The spelling of 20769319 in words is "twenty million, seven hundred sixty-nine thousand, three hundred nineteen".