20492589 has 16 divisors (see below), whose sum is σ = 30441600. Its totient is φ = 12175296.

The previous prime is 20492569. The next prime is 20492603. The reversal of 20492589 is 98529402.

It is not a de Polignac number, because 20492589 - 2⁹ = 20492077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20492509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7929 + ... + 10190.

It is an arithmetic number, because the mean of its divisors is an integer number (1902600).

Almost surely, 2^20492589 is an apocalyptic number.

20492589 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20492589 is a deficient number, since it is larger than the sum of its proper divisors (9949011).

20492589 is a wasteful number, since it uses less digits than its factorization.

20492589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18164.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20492589 is about 4526.8740870495. The cubic root of 20492589 is about 273.6521995877.

The spelling of 20492589 in words is "twenty million, four hundred ninety-two thousand, five hundred eighty-nine".