20221400 has 24 divisors (see below), whose sum is σ = 47015220. Its totient is φ = 8088480.

The previous prime is 20221391. The next prime is 20221403. The reversal of 20221400 is 412202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50354 + ... + 50753.

Almost surely, 2^20221400 is an apocalyptic number.

20221400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221400 is an abundant number, since it is smaller than the sum of its proper divisors (26793820).

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

20221400 is a wasteful number, since it uses less digits than its factorization.

20221400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101123 (or 101114 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20221400 is about 4496.8210993990. The cubic root of 20221400 is about 272.4397083457.

Adding to 20221400 its reverse (412202), we get a palindrome (20633602).

The spelling of 20221400 in words is "twenty million, two hundred twenty-one thousand, four hundred".