20266449 has 12 divisors (see below), whose sum is σ = 31433904. Its totient is φ = 11580744.

The previous prime is 20266429. The next prime is 20266451. The reversal of 20266449 is 94466202.

It is a happy number.

It is not a de Polignac number, because 20266449 - 2¹¹ = 20264401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20266409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68787 + ... + 69080.

It is an arithmetic number, because the mean of its divisors is an integer number (2619492).

Almost surely, 2^20266449 is an apocalyptic number.

It is an amenable number.

20266449 is a deficient number, since it is larger than the sum of its proper divisors (11167455).

20266449 is a wasteful number, since it uses less digits than its factorization.

20266449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137884 (or 137877 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20266449 is about 4501.8272956656. The cubic root of 20266449 is about 272.6418709672.

The spelling of 20266449 in words is "twenty million, two hundred sixty-six thousand, four hundred forty-nine".