20514619 has 2 divisors, whose sum is σ = 20514620. Its totient is φ = 20514618.

The previous prime is 20514617. The next prime is 20514677. The reversal of 20514619 is 91641502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20514619 - 2¹ = 20514617 is a prime.

It is a super-2 number, since 2×20514619² = 841699185430322, which contains 22 as substring.

Together with 20514617, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20514617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257309 + 10257310.

It is an arithmetic number, because the mean of its divisors is an integer number (10257310).

Almost surely, 2^20514619 is an apocalyptic number.

20514619 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514619 is an equidigital number, since it uses as much as digits as its factorization.

20514619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20514619 is about 4529.3066798352. The cubic root of 20514619 is about 273.7502252523.

It can be divided in two parts, 2051 and 4619, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20514619 in words is "twenty million, five hundred fourteen thousand, six hundred nineteen".