21725355222426 has 8 divisors (see below), whose sum is σ = 43450710444864. Its totient is φ = 7241785074140.

The previous prime is 21725355222421. The next prime is 21725355222499. The reversal of 21725355222426 is 62422255352712.

It is a sphenic number, since it is the product of 3 distinct primes.

21725355222426 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21725355222421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810446268530 + ... + 1810446268541.

It is an arithmetic number, because the mean of its divisors is an integer number (5431338805608).

Almost surely, 2^{21725355222426} is an apocalyptic number.

21725355222426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21725355222426 is a wasteful number, since it uses less digits than its factorization.

21725355222426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620892537076.

The product of its digits is 4032000, while the sum is 48.

The spelling of 21725355222426 in words is "twenty-one trillion, seven hundred twenty-five billion, three hundred fifty-five million, two hundred twenty-two thousand, four hundred twenty-six".