21547474075408 has 40 divisors (see below), whose sum is σ = 44367123893760. Its totient is φ = 10102570836480.

The previous prime is 21547474075403. The next prime is 21547474075469. The reversal of 21547474075408 is 80457047474512.

It is not an unprimeable number, because it can be changed into a prime (21547474075403) 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, 146086168 + ... + 146233591.

It is an arithmetic number, because the mean of its divisors is an integer number (1109178097344).

Almost surely, 2^{21547474075408} is an apocalyptic number.

It is an amenable number.

21547474075408 is an abundant number, since it is smaller than the sum of its proper divisors (22819649818352).

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

21547474075408 is a wasteful number, since it uses less digits than its factorization.

21547474075408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292320055 (or 292320049 counting only the distinct ones).

The product of its (nonzero) digits is 35123200, while the sum is 58.

The spelling of 21547474075408 in words is "twenty-one trillion, five hundred forty-seven billion, four hundred seventy-four million, seventy-five thousand, four hundred eight".