20980469 has 2 divisors, whose sum is σ = 20980470. Its totient is φ = 20980468.

The previous prime is 20980457. The next prime is 20980481. The reversal of 20980469 is 96408902.

It is a balanced prime because it is at equal distance from previous prime (20980457) and next prime (20980481).

It can be written as a sum of positive squares in only one way, i.e., 10804369 + 10176100 = 3287^2 + 3190^2 .

It is a cyclic number.

It is not a de Polignac number, because 20980469 - 2⁸ = 20980213 is a prime.

It is a super-2 number, since 2×20980469² = 880360158919922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20980409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10490234 + 10490235.

It is an arithmetic number, because the mean of its divisors is an integer number (10490235).

Almost surely, 2^20980469 is an apocalyptic number.

It is an amenable number.

20980469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20980469 is an equidigital number, since it uses as much as digits as its factorization.

20980469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 20980469 is about 4580.4441924337. Note that the first 3 decimals coincide. The cubic root of 20980469 is about 275.8068600797.

The spelling of 20980469 in words is "twenty million, nine hundred eighty thousand, four hundred sixty-nine".