20799497 has 2 divisors, whose sum is σ = 20799498. Its totient is φ = 20799496.

The previous prime is 20799491. The next prime is 20799503. The reversal of 20799497 is 79499702.

It is a balanced prime because it is at equal distance from previous prime (20799491) and next prime (20799503).

It can be written as a sum of positive squares in only one way, i.e., 11703241 + 9096256 = 3421^2 + 3016^2 .

It is a cyclic number.

It is not a de Polignac number, because 20799497 - 2¹⁰ = 20798473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20799491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399748 + 10399749.

It is an arithmetic number, because the mean of its divisors is an integer number (10399749).

Almost surely, 2^20799497 is an apocalyptic number.

It is an amenable number.

20799497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20799497 is an equidigital number, since it uses as much as digits as its factorization.

20799497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 20799497 is about 4560.6465550402. The cubic root of 20799497 is about 275.0115565391.

The spelling of 20799497 in words is "twenty million, seven hundred ninety-nine thousand, four hundred ninety-seven".