21996219818196 has 72 divisors (see below), whose sum is σ = 61271123994080. Its totient is φ = 6610670708544.

The previous prime is 21996219818179. The next prime is 21996219818213. The reversal of 21996219818196 is 69181891269912.

It is a happy number.

21996219818196 is a `hidden beast` number, since 2 + 199 + 62 + 198 + 1 + 8 + 196 = 666.

It is an interprime number because it is at equal distance from previous prime (21996219818179) and next prime (21996219818213).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546496966 + ... + 546537213.

Almost surely, 2^{21996219818196} is an apocalyptic number.

21996219818196 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21996219818196 is an abundant number, since it is smaller than the sum of its proper divisors (39274904175884).

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

21996219818196 is a wasteful number, since it uses less digits than its factorization.

21996219818196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093034245 (or 1093034240 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 72.

The spelling of 21996219818196 in words is "twenty-one trillion, nine hundred ninety-six billion, two hundred nineteen million, eight hundred eighteen thousand, one hundred ninety-six".