21725243545202 has 8 divisors (see below), whose sum is σ = 33281224154496. Its totient is φ = 10631502160372.

The previous prime is 21725243545189. The next prime is 21725243545211. The reversal of 21725243545202 is 20254534252712.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115559805998 + ... + 115559806185.

It is an arithmetic number, because the mean of its divisors is an integer number (4160153019312).

Almost surely, 2^{21725243545202} is an apocalyptic number.

21725243545202 is a deficient number, since it is larger than the sum of its proper divisors (11555980609294).

21725243545202 is a wasteful number, since it uses less digits than its factorization.

21725243545202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231119612232.

The product of its (nonzero) digits is 1344000, while the sum is 44.

Adding to 21725243545202 its reverse (20254534252712), we get a palindrome (41979777797914).

The spelling of 21725243545202 in words is "twenty-one trillion, seven hundred twenty-five billion, two hundred forty-three million, five hundred forty-five thousand, two hundred two".