19996812 has 36 divisors (see below), whose sum is σ = 55143816. Its totient is φ = 6059520.

The previous prime is 19996793. The next prime is 19996831. The reversal of 19996812 is 21869991.

It is an interprime number because it is at equal distance from previous prime (19996793) and next prime (19996831).

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24853 + ... + 25644.

Almost surely, 2^19996812 is an apocalyptic number.

19996812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19996812 is an abundant number, since it is smaller than the sum of its proper divisors (35147004).

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

19996812 is a wasteful number, since it uses less digits than its factorization.

19996812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50518 (or 50513 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 19996812 is about 4471.7795115591. The cubic root of 19996812 is about 271.4273382875.

The spelling of 19996812 in words is "nineteen million, nine hundred ninety-six thousand, eight hundred twelve".