21603963620196 has 192 divisors, whose sum is σ = 58479682060800. Its totient is φ = 6891223910400.

The previous prime is 21603963620177. The next prime is 21603963620251. The reversal of 21603963620196 is 69102636930612.

21603963620196 is a `hidden beast` number, since 2 + 1 + 6 + 0 + 3 + 9 + 6 + 3 + 620 + 1 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 96857376 + ... + 97080168.

It is an arithmetic number, because the mean of its divisors is an integer number (304581677400).

Almost surely, 2^{21603963620196} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21603963620196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29239841030400).

21603963620196 is an abundant number, since it is smaller than the sum of its proper divisors (36875718440604).

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

21603963620196 is a wasteful number, since it uses less digits than its factorization.

21603963620196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223267 (or 223259 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 54.

The spelling of 21603963620196 in words is "twenty-one trillion, six hundred three billion, nine hundred sixty-three million, six hundred twenty thousand, one hundred ninety-six".