20495600 has 30 divisors (see below), whose sum is σ = 49241640. Its totient is φ = 8198080.

The previous prime is 20495581. The next prime is 20495609. The reversal of 20495600 is 659402.

It is a self number, because there is not a number n which added to its sum of digits gives 20495600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20495609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25220 + ... + 26019.

It is an arithmetic number, because the mean of its divisors is an integer number (1641388).

Almost surely, 2^20495600 is an apocalyptic number.

20495600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20495600 is an abundant number, since it is smaller than the sum of its proper divisors (28746040).

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

20495600 is a wasteful number, since it uses less digits than its factorization.

20495600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51257 (or 51246 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20495600 is about 4527.2066442786. The cubic root of 20495600 is about 273.6656016103.

The spelling of 20495600 in words is "twenty million, four hundred ninety-five thousand, six hundred".