20934489 has 16 divisors (see below), whose sum is σ = 28880000. Its totient is φ = 13478400.

The previous prime is 20934481. The next prime is 20934499. The reversal of 20934489 is 98443902.

It is not a de Polignac number, because 20934489 - 2³ = 20934481 is a prime.

It is a super-2 number, since 2×20934489² = 876505659382242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20934481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16137 + ... + 17385.

It is an arithmetic number, because the mean of its divisors is an integer number (1805000).

Almost surely, 2^20934489 is an apocalyptic number.

It is an amenable number.

20934489 is a deficient number, since it is larger than the sum of its proper divisors (7945511).

20934489 is a wasteful number, since it uses less digits than its factorization.

20934489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 20934489 is about 4575.4222755938. The cubic root of 20934489 is about 275.6052300956.

The spelling of 20934489 in words is "twenty million, nine hundred thirty-four thousand, four hundred eighty-nine".