21155144022596 has 12 divisors (see below), whose sum is σ = 37158112750080. Its totient is φ = 10538540379720.

The previous prime is 21155144022589. The next prime is 21155144022601. The reversal of 21155144022596 is 69522044155112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21155144022596.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9757906676 + ... + 9757908843.

It is an arithmetic number, because the mean of its divisors is an integer number (3096509395840).

Almost surely, 2^{21155144022596} is an apocalyptic number.

It is an amenable number.

21155144022596 is a deficient number, since it is larger than the sum of its proper divisors (16002968727484).

21155144022596 is a wasteful number, since it uses less digits than its factorization.

21155144022596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19515815794 (or 19515815792 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 21155144022596 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred forty-four million, twenty-two thousand, five hundred ninety-six".