20819027 has 2 divisors, whose sum is σ = 20819028. Its totient is φ = 20819026.

The previous prime is 20819023. The next prime is 20819047. The reversal of 20819027 is 72091802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20819027 - 2² = 20819023 is a prime.

It is not a weakly prime, because it can be changed into another prime (20819023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10409513 + 10409514.

It is an arithmetic number, because the mean of its divisors is an integer number (10409514).

Almost surely, 2^20819027 is an apocalyptic number.

20819027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20819027 is an equidigital number, since it uses as much as digits as its factorization.

20819027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 20819027 is about 4562.7871964404. The cubic root of 20819027 is about 275.0976050226.

The spelling of 20819027 in words is "twenty million, eight hundred nineteen thousand, twenty-seven".