20840532 has 12 divisors (see below), whose sum is σ = 48627936. Its totient is φ = 6946840.

The previous prime is 20840527. The next prime is 20840537. The reversal of 20840532 is 23504802.

It is an interprime number because it is at equal distance from previous prime (20840527) and next prime (20840537).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20840537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868344 + ... + 868367.

It is an arithmetic number, because the mean of its divisors is an integer number (4052328).

Almost surely, 2^20840532 is an apocalyptic number.

It is an amenable number.

20840532 is an abundant number, since it is smaller than the sum of its proper divisors (27787404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20840532 is a wasteful number, since it uses less digits than its factorization.

20840532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736718 (or 1736716 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20840532 is about 4565.1431521914. The cubic root of 20840532 is about 275.1922930564.

The spelling of 20840532 in words is "twenty million, eight hundred forty thousand, five hundred thirty-two".