20622020 has 48 divisors (see below), whose sum is σ = 46303488. Its totient is φ = 7687680.

The previous prime is 20622001. The next prime is 20622023. The reversal of 20622020 is 2022602.

It is a junction number, because it is equal to n+sod(n) for n = 20621986 and 20622004.

It is not an unprimeable number, because it can be changed into a prime (20622023) 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, 44309 + ... + 44771.

It is an arithmetic number, because the mean of its divisors is an integer number (964656).

Almost surely, 2^20622020 is an apocalyptic number.

20622020 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 20622020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23151744).

20622020 is an abundant number, since it is smaller than the sum of its proper divisors (25681468).

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

20622020 is a wasteful number, since it uses less digits than its factorization.

20622020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20622020 is about 4541.1474320925. The cubic root of 20622020 is about 274.2271191281.

Adding to 20622020 its reverse (2022602), we get a palindrome (22644622).

The spelling of 20622020 in words is "twenty million, six hundred twenty-two thousand, twenty".