21500226031344 has 40 divisors (see below), whose sum is σ = 55542880504320. Its totient is φ = 7166660730048.

The previous prime is 21500226031313. The next prime is 21500226031367. The reversal of 21500226031344 is 44313062200512.

It is a congruent number.

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, 1813299 + ... + 6803565.

It is an arithmetic number, because the mean of its divisors is an integer number (1388572012608).

Almost surely, 2^{21500226031344} is an apocalyptic number.

21500226031344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21500226031344 is an abundant number, since it is smaller than the sum of its proper divisors (34042654472976).

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

21500226031344 is a wasteful number, since it uses less digits than its factorization.

21500226031344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080037 (or 5080031 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21500226031344 its reverse (44313062200512), we get a palindrome (65813288231856).

The spelling of 21500226031344 in words is "twenty-one trillion, five hundred billion, two hundred twenty-six million, thirty-one thousand, three hundred forty-four".