20022100 has 36 divisors (see below), whose sum is σ = 49656544. Its totient is φ = 6864480.

The previous prime is 20022097. The next prime is 20022103. The reversal of 20022100 is 122002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20022097) and next prime (20022103).

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13602 + ... + 15001.

Almost surely, 2^20022100 is an apocalyptic number.

20022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022100 is an abundant number, since it is smaller than the sum of its proper divisors (29634444).

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

20022100 is a wasteful number, since it uses less digits than its factorization.

20022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28624 (or 28617 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20022100 is about 4474.6061279179. The cubic root of 20022100 is about 271.5417059046.

Adding to 20022100 its reverse (122002), we get a palindrome (20144102).

The spelling of 20022100 in words is "twenty million, twenty-two thousand, one hundred".