21582755181384 has 32 divisors (see below), whose sum is σ = 53957211225120. Its totient is φ = 7194208624256.

The previous prime is 21582755181367. The next prime is 21582755181413. The reversal of 21582755181384 is 48318155728512.

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, 1530532 + ... + 6745964.

It is an arithmetic number, because the mean of its divisors is an integer number (1686162850785).

Almost surely, 2^{21582755181384} is an apocalyptic number.

21582755181384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21582755181384 is an abundant number, since it is smaller than the sum of its proper divisors (32374456043736).

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

21582755181384 is a wasteful number, since it uses less digits than its factorization.

21582755181384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387869 (or 5387865 counting only the distinct ones).

The product of its digits is 21504000, while the sum is 60.

The spelling of 21582755181384 in words is "twenty-one trillion, five hundred eighty-two billion, seven hundred fifty-five million, one hundred eighty-one thousand, three hundred eighty-four".