21773682567420 has 96 divisors (see below), whose sum is σ = 71158247774208. Its totient is φ = 4870951475712.

The previous prime is 21773682567349. The next prime is 21773682567451. The reversal of 21773682567420 is 2476528637712.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 551491977 + ... + 551531456.

It is an arithmetic number, because the mean of its divisors is an integer number (741231747648).

Almost surely, 2^{21773682567420} is an apocalyptic number.

21773682567420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21773682567420 is an abundant number, since it is smaller than the sum of its proper divisors (49384565206788).

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

21773682567420 is a wasteful number, since it uses less digits than its factorization.

21773682567420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103023499 (or 1103023497 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 60.

The spelling of 21773682567420 in words is "twenty-one trillion, seven hundred seventy-three billion, six hundred eighty-two million, five hundred sixty-seven thousand, four hundred twenty".