20359040 has 64 divisors (see below), whose sum is σ = 52436160. Its totient is φ = 7514112.

The previous prime is 20359021. The next prime is 20359057. The reversal of 20359040 is 4095302.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 20358997 and 20359015.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7097 + ... + 9543.

It is an arithmetic number, because the mean of its divisors is an integer number (819315).

Almost surely, 2^20359040 is an apocalyptic number.

20359040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20359040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26218080).

20359040 is an abundant number, since it is smaller than the sum of its proper divisors (32077120).

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

20359040 is a wasteful number, since it uses less digits than its factorization.

20359040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20359040 is about 4512.0992896877. The cubic root of 20359040 is about 273.0564450994.

The spelling of 20359040 in words is "twenty million, three hundred fifty-nine thousand, forty".