20750489 has 12 divisors (see below), whose sum is σ = 23209200. Its totient is φ = 18497088.

The previous prime is 20750479. The next prime is 20750537. The reversal of 20750489 is 98405702.

It is a happy number.

It is not a de Polignac number, because 20750489 - 2⁴ = 20750473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20750419) 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 in 11 ways as a sum of consecutive naturals, for example, 3602 + ... + 7380.

It is an arithmetic number, because the mean of its divisors is an integer number (1934100).

Almost surely, 2^20750489 is an apocalyptic number.

It is an amenable number.

20750489 is a deficient number, since it is larger than the sum of its proper divisors (2458711).

20750489 is a wasteful number, since it uses less digits than its factorization.

20750489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832 (or 3815 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20750489 is about 4555.2704639791. The cubic root of 20750489 is about 274.7953916045.

The spelling of 20750489 in words is "twenty million, seven hundred fifty thousand, four hundred eighty-nine".