19993000212 has 72 divisors (see below), whose sum is σ = 53541784296. Its totient is φ = 6268667904.

The previous prime is 19993000189. The next prime is 19993000213. The reversal of 19993000212 is 21200039991.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8611097616 + 11381902596 = 92796^2 + 106686^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19993000213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1162218 + ... + 1179294.

It is an arithmetic number, because the mean of its divisors is an integer number (743635893).

Almost surely, 2^19993000212 is an apocalyptic number.

19993000212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19993000212 is an abundant number, since it is smaller than the sum of its proper divisors (33548784084).

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

19993000212 is a wasteful number, since it uses less digits than its factorization.

19993000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19017 (or 19012 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The spelling of 19993000212 in words is "nineteen billion, nine hundred ninety-three million, two hundred twelve", and thus it is an aban number.