20602619 has 2 divisors, whose sum is σ = 20602620. Its totient is φ = 20602618.

The previous prime is 20602613. The next prime is 20602627. The reversal of 20602619 is 91620602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20602619 is a prime.

It is a super-2 number, since 2×20602619² = 848935819318322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20602613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10301309 + 10301310.

It is an arithmetic number, because the mean of its divisors is an integer number (10301310).

Almost surely, 2^20602619 is an apocalyptic number.

20602619 is a deficient number, since it is larger than the sum of its proper divisors (1).

20602619 is an equidigital number, since it uses as much as digits as its factorization.

20602619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20602619 is about 4539.0107953165. The cubic root of 20602619 is about 274.1410953917.

The spelling of 20602619 in words is "twenty million, six hundred two thousand, six hundred nineteen".