21550325033420 has 24 divisors (see below), whose sum is σ = 45485406855504. Its totient is φ = 8576373006656.

The previous prime is 21550325033383. The next prime is 21550325033437. The reversal of 21550325033420 is 2433052305512.

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, 2734808882 + ... + 2734816761.

It is an arithmetic number, because the mean of its divisors is an integer number (1895225285646).

Almost surely, 2^{21550325033420} is an apocalyptic number.

21550325033420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21550325033420 is an abundant number, since it is smaller than the sum of its proper divisors (23935081822084).

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

21550325033420 is a wasteful number, since it uses less digits than its factorization.

21550325033420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469625849 (or 5469625847 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 21550325033420 its reverse (2433052305512), we get a palindrome (23983377338932).

The spelling of 21550325033420 in words is "twenty-one trillion, five hundred fifty billion, three hundred twenty-five million, thirty-three thousand, four hundred twenty".