20606020 has 24 divisors (see below), whose sum is σ = 43705368. Its totient is φ = 8160800.

The previous prime is 20606017. The next prime is 20606063. The reversal of 20606020 is 2060602.

It can be written as a sum of positive squares in 4 ways, for example, as 10771524 + 9834496 = 3282^2 + 3136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20605985 and 20606003.

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, 203970 + ... + 204070.

It is an arithmetic number, because the mean of its divisors is an integer number (1821057).

Almost surely, 2^20606020 is an apocalyptic number.

20606020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20606020 is an abundant number, since it is smaller than the sum of its proper divisors (23099348).

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

20606020 is an frugal number, since it uses more digits than its factorization.

20606020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20606020 is about 4539.3854209573. The cubic root of 20606020 is about 274.1561792761.

Adding to 20606020 its reverse (2060602), we get a palindrome (22666622).

The spelling of 20606020 in words is "twenty million, six hundred six thousand, twenty".