20489512 has 16 divisors (see below), whose sum is σ = 39657600. Its totient is φ = 9914160.

The previous prime is 20489507. The next prime is 20489531. The reversal of 20489512 is 21598402.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41062 + ... + 41557.

It is an arithmetic number, because the mean of its divisors is an integer number (2478600).

Almost surely, 2^20489512 is an apocalyptic number.

It is an amenable number.

20489512 is a deficient number, since it is larger than the sum of its proper divisors (19168088).

20489512 is a wasteful number, since it uses less digits than its factorization.

20489512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82656 (or 82652 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 20489512 is about 4526.5342150480. The cubic root of 20489512 is about 273.6385024414.

The spelling of 20489512 in words is "twenty million, four hundred eighty-nine thousand, five hundred twelve".