21773545207044 has 24 divisors (see below), whose sum is σ = 50805435176160. Its totient is φ = 7257777493824.

The previous prime is 21773545206983. The next prime is 21773545207159. The reversal of 21773545207044 is 44070254537712.

It is a happy 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, 7576654 + ... + 10047525.

It is an arithmetic number, because the mean of its divisors is an integer number (2116893132340).

Almost surely, 2^{21773545207044} is an apocalyptic number.

It is an amenable number.

21773545207044 is an abundant number, since it is smaller than the sum of its proper divisors (29031889969116).

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

21773545207044 is a wasteful number, since it uses less digits than its factorization.

21773545207044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17727139 (or 17727137 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 51.

The spelling of 21773545207044 in words is "twenty-one trillion, seven hundred seventy-three billion, five hundred forty-five million, two hundred seven thousand, forty-four".