21773390133 has 12 divisors (see below), whose sum is σ = 31910313344. Its totient is φ = 13195993800.

The previous prime is 21773390077. The next prime is 21773390141. The reversal of 21773390133 is 33109337712.

It is not a de Polignac number, because 21773390133 - 2¹⁴ = 21773373749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21773390091 and 21773390100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21773390143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29990533 + ... + 29991258.

Almost surely, 2^21773390133 is an apocalyptic number.

It is an amenable number.

21773390133 is a deficient number, since it is larger than the sum of its proper divisors (10136923211).

21773390133 is a wasteful number, since it uses less digits than its factorization.

21773390133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59981816 (or 59981805 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 39.

The spelling of 21773390133 in words is "twenty-one billion, seven hundred seventy-three million, three hundred ninety thousand, one hundred thirty-three".