21403032002250 has 64 divisors (see below), whose sum is σ = 53422632521856. Its totient is φ = 5707404192000.

The previous prime is 21403032002189. The next prime is 21403032002309. The reversal of 21403032002250 is 5220023030412.

It is a self number, because there is not a number n which added to its sum of digits gives 21403032002250.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92106210 + ... + 92338290.

It is an arithmetic number, because the mean of its divisors is an integer number (834728633154).

Almost surely, 2^{21403032002250} is an apocalyptic number.

21403032002250 is an abundant number, since it is smaller than the sum of its proper divisors (32019600519606).

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

21403032002250 is a wasteful number, since it uses less digits than its factorization.

21403032002250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355064 (or 355054 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 21403032002250 its reverse (5220023030412), we get a palindrome (26623055032662).

The spelling of 21403032002250 in words is "twenty-one trillion, four hundred three billion, thirty-two million, two thousand, two hundred fifty".