20719087 has 2 divisors, whose sum is σ = 20719088. Its totient is φ = 20719086.

The previous prime is 20719019. The next prime is 20719109. The reversal of 20719087 is 78091702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20719087 - 2⁷ = 20718959 is a prime.

It is a super-2 number, since 2×20719087² = 858561132227138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20711087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10359543 + 10359544.

It is an arithmetic number, because the mean of its divisors is an integer number (10359544).

Almost surely, 2^20719087 is an apocalyptic number.

20719087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20719087 is an equidigital number, since it uses as much as digits as its factorization.

20719087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 20719087 is about 4551.8223822992. The cubic root of 20719087 is about 274.6567044085.

The spelling of 20719087 in words is "twenty million, seven hundred nineteen thousand, eighty-seven".