20914489 has 8 divisors (see below), whose sum is σ = 21441672. Its totient is φ = 20392320.

The previous prime is 20914477. The next prime is 20914507. The reversal of 20914489 is 98441902.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10725625 + 10188864 = 3275^2 + 3192^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20914489 - 2⁵ = 20914457 is a prime.

It is a super-2 number, since 2×20914489² = 874831700262242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20914409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8029 + ... + 10309.

It is an arithmetic number, because the mean of its divisors is an integer number (2680209).

Almost surely, 2^20914489 is an apocalyptic number.

It is an amenable number.

20914489 is a deficient number, since it is larger than the sum of its proper divisors (527183).

20914489 is a wasteful number, since it uses less digits than its factorization.

20914489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 20914489 is about 4573.2361627189. The cubic root of 20914489 is about 275.5174346100.

The spelling of 20914489 in words is "twenty million, nine hundred fourteen thousand, four hundred eighty-nine".