20542600 has 48 divisors (see below), whose sum is σ = 51442020. Its totient is φ = 7584000.

The previous prime is 20542589. The next prime is 20542603. The reversal of 20542600 is 624502.

It can be written as a sum of positive squares in 6 ways, for example, as 5503716 + 15038884 = 2346^2 + 3878^2 .

It is not an unprimeable number, because it can be changed into a prime (20542603) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1351 + ... + 6550.

Almost surely, 2^20542600 is an apocalyptic number.

20542600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20542600 is an abundant number, since it is smaller than the sum of its proper divisors (30899420).

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

20542600 is a wasteful number, since it uses less digits than its factorization.

20542600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7930 (or 7921 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20542600 is about 4532.3945106312. The cubic root of 20542600 is about 273.8746296286.

The spelling of 20542600 in words is "twenty million, five hundred forty-two thousand, six hundred".