20552620 has 48 divisors (see below), whose sum is σ = 47593728. Its totient is φ = 7392960.

The previous prime is 20552611. The next prime is 20552627. The reversal of 20552620 is 2625502.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20552591 and 20552600.

It is not an unprimeable number, because it can be changed into a prime (20552627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22207 + ... + 23113.

It is an arithmetic number, because the mean of its divisors is an integer number (991536).

Almost surely, 2^20552620 is an apocalyptic number.

20552620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20552620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23796864).

20552620 is an abundant number, since it is smaller than the sum of its proper divisors (27041108).

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

20552620 is a wasteful number, since it uses less digits than its factorization.

20552620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20552620 is about 4533.4997518474. The cubic root of 20552620 is about 273.9191513823.

It can be divided in two parts, 205 and 52620, that added together give a palindrome (52825).

The spelling of 20552620 in words is "twenty million, five hundred fifty-two thousand, six hundred twenty".