20603040 has 48 divisors (see below), whose sum is σ = 64901088. Its totient is φ = 5494016.

The previous prime is 20603027. The next prime is 20603041. The reversal of 20603040 is 4030602.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20603041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20982 + ... + 21941.

It is an arithmetic number, because the mean of its divisors is an integer number (1352106).

Almost surely, 2^20603040 is an apocalyptic number.

20603040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20603040 is an abundant number, since it is smaller than the sum of its proper divisors (44298048).

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

20603040 is a wasteful number, since it uses less digits than its factorization.

20603040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42941 (or 42933 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20603040 is about 4539.0571708230. The cubic root of 20603040 is about 274.1429626724.

Adding to 20603040 its reverse (4030602), we get a palindrome (24633642).

The spelling of 20603040 in words is "twenty million, six hundred three thousand, forty".