20213628 has 24 divisors (see below), whose sum is σ = 47279232. Its totient is φ = 6721584.

The previous prime is 20213623. The next prime is 20213639. The reversal of 20213628 is 82631202.

It is a junction number, because it is equal to n+sod(n) for n = 20213598 and 20213607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213623) 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, 3801 + ... + 7407.

It is an arithmetic number, because the mean of its divisors is an integer number (1969968).

Almost surely, 2^20213628 is an apocalyptic number.

It is an amenable number.

20213628 is an abundant number, since it is smaller than the sum of its proper divisors (27065604).

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

20213628 is a wasteful number, since it uses less digits than its factorization.

20213628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4079 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20213628 is about 4495.9568503267. The cubic root of 20213628 is about 272.4048002328.

The spelling of 20213628 in words is "twenty million, two hundred thirteen thousand, six hundred twenty-eight".