21773248338 has 16 divisors (see below), whose sum is σ = 46108055520. Its totient is φ = 6830822976.

The previous prime is 21773248337. The next prime is 21773248339. The reversal of 21773248338 is 83384237712.

It is an interprime number because it is at equal distance from previous prime (21773248337) and next prime (21773248339).

It is not an unprimeable number, because it can be changed into a prime (21773248337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106731508 + ... + 106731711.

It is an arithmetic number, because the mean of its divisors is an integer number (2881753470).

Almost surely, 2^21773248338 is an apocalyptic number.

21773248338 is an abundant number, since it is smaller than the sum of its proper divisors (24334807182).

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

21773248338 is a wasteful number, since it uses less digits than its factorization.

21773248338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213463241.

The product of its digits is 1354752, while the sum is 48.

The spelling of 21773248338 in words is "twenty-one billion, seven hundred seventy-three million, two hundred forty-eight thousand, three hundred thirty-eight".