21330426546650 has 96 divisors (see below), whose sum is σ = 42917105348208. Its totient is φ = 7840723968000.

The previous prime is 21330426546599. The next prime is 21330426546829. The reversal of 21330426546650 is 5664562403312.

It can be written as a sum of positive squares in 24 ways, for example, as 2690423343001 + 18640003203649 = 1640251^2 + 4317407^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21330426546595 and 21330426546604.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1692750350 + ... + 1692762950.

Almost surely, 2^{21330426546650} is an apocalyptic number.

21330426546650 is an abundant number, since it is smaller than the sum of its proper divisors (21586678801558).

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

21330426546650 is a wasteful number, since it uses less digits than its factorization.

21330426546650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24036 (or 24031 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 47.

Adding to 21330426546650 its reverse (5664562403312), we get a palindrome (26994988949962).

The spelling of 21330426546650 in words is "twenty-one trillion, three hundred thirty billion, four hundred twenty-six million, five hundred forty-six thousand, six hundred fifty".