21941065446 has 16 divisors (see below), whose sum is σ = 43938908784. Its totient is φ = 7304225504.

The previous prime is 21941065409. The next prime is 21941065457. The reversal of 21941065446 is 64456014912.

It is a junction number, because it is equal to n+sod(n) for n = 21941065398 and 21941065407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2360721 + ... + 2369996.

It is an arithmetic number, because the mean of its divisors is an integer number (2746181799).

Almost surely, 2^21941065446 is an apocalyptic number.

21941065446 is an abundant number, since it is smaller than the sum of its proper divisors (21997843338).

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

21941065446 is a wasteful number, since it uses less digits than its factorization.

21941065446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731495.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 21941065446 in words is "twenty-one billion, nine hundred forty-one million, sixty-five thousand, four hundred forty-six".