21354545436050 has 48 divisors (see below), whose sum is σ = 40806694162752. Its totient is φ = 8308158724800.

The previous prime is 21354545436023. The next prime is 21354545436143. The reversal of 21354545436050 is 5063454545312.

It is a super-2 number, since 2×21354545436050² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21354545435986 and 21354545436004.

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, 3553739 + ... + 7438961.

It is an arithmetic number, because the mean of its divisors is an integer number (850139461724).

Almost surely, 2^{21354545436050} is an apocalyptic number.

21354545436050 is a deficient number, since it is larger than the sum of its proper divisors (19452148726702).

21354545436050 is a wasteful number, since it uses less digits than its factorization.

21354545436050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888243 (or 3888238 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 47.

The spelling of 21354545436050 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred forty-five million, four hundred thirty-six thousand, fifty".