20199212 has 24 divisors (see below), whose sum is σ = 39033792. Its totient is φ = 9069200.

The previous prime is 20199211. The next prime is 20199229. The reversal of 20199212 is 21299102.

It is a happy number.

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20199211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (1626408).

Almost surely, 2^20199212 is an apocalyptic number.

20199212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20199212 is a deficient number, since it is larger than the sum of its proper divisors (18834580).

20199212 is a wasteful number, since it uses less digits than its factorization.

20199212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629 (or 5627 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 20199212 is about 4494.3533461445. The cubic root of 20199212 is about 272.3400267456.

The spelling of 20199212 in words is "twenty million, one hundred ninety-nine thousand, two hundred twelve".