20754919 has 2 divisors, whose sum is σ = 20754920. Its totient is φ = 20754918.

The previous prime is 20754917. The next prime is 20754931. The reversal of 20754919 is 91945702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20754919 - 2¹ = 20754917 is a prime.

It is a super-2 number, since 2×20754919² = 861533325393122, which contains 22 as substring.

Together with 20754917, 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 (20754911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10377459 + 10377460.

It is an arithmetic number, because the mean of its divisors is an integer number (10377460).

Almost surely, 2^20754919 is an apocalyptic number.

20754919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20754919 is an equidigital number, since it uses as much as digits as its factorization.

20754919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 20754919 is about 4555.7566879718. The cubic root of 20754919 is about 274.8149454725.

The spelling of 20754919 in words is "twenty million, seven hundred fifty-four thousand, nine hundred nineteen".