20613269 has 2 divisors, whose sum is σ = 20613270. Its totient is φ = 20613268.

The previous prime is 20613253. The next prime is 20613301. The reversal of 20613269 is 96231602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20584369 + 28900 = 4537^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 20613269 - 2⁴ = 20613253 is a prime.

It is a super-2 number, since 2×20613269² = 849813717732722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20613209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10306634 + 10306635.

It is an arithmetic number, because the mean of its divisors is an integer number (10306635).

Almost surely, 2^20613269 is an apocalyptic number.

It is an amenable number.

20613269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20613269 is an equidigital number, since it uses as much as digits as its factorization.

20613269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20613269 is about 4540.1838068519. The cubic root of 20613269 is about 274.1883240109.

The spelling of 20613269 in words is "twenty million, six hundred thirteen thousand, two hundred sixty-nine".