21650461204442 has 128 divisors (see below), whose sum is σ = 38346499215360. Its totient is φ = 8977526046720.

The previous prime is 21650461204423. The next prime is 21650461204459. The reversal of 21650461204442 is 24440216405612.

It is a self number, because there is not a number n which added to its sum of digits gives 21650461204442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8884061648 + ... + 8884064084.

It is an arithmetic number, because the mean of its divisors is an integer number (299582025120).

Almost surely, 2^{21650461204442} is an apocalyptic number.

21650461204442 is a deficient number, since it is larger than the sum of its proper divisors (16696038010918).

21650461204442 is a wasteful number, since it uses less digits than its factorization.

21650461204442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 368640, while the sum is 41.

The spelling of 21650461204442 in words is "twenty-one trillion, six hundred fifty billion, four hundred sixty-one million, two hundred four thousand, four hundred forty-two".