20022000 has 160 divisors (see below), whose sum is σ = 66852864. Its totient is φ = 5152000.

The previous prime is 20021999. The next prime is 20022011. The reversal of 20022000 is 22002.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 20022000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281965 + ... + 282035.

Almost surely, 2^20022000 is an apocalyptic number.

20022000 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 20022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33426432).

20022000 is an abundant number, since it is smaller than the sum of its proper divisors (46830864).

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

20022000 is a wasteful number, since it uses less digits than its factorization.

20022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 20022000 is about 4474.5949537360. The cubic root of 20022000 is about 271.5412538339.

Adding to 20022000 its reverse (22002), we get a palindrome (20044002).

The spelling of 20022000 in words is "twenty million, twenty-two thousand".