21253470960450 has 24 divisors (see below), whose sum is σ = 52708607982288. Its totient is φ = 5667592256080.

The previous prime is 21253470960427. The next prime is 21253470960487. The reversal of 21253470960450 is 5406907435212.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21253470960450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70844903052 + ... + 70844903351.

It is an arithmetic number, because the mean of its divisors is an integer number (2196191999262).

Almost surely, 2^{21253470960450} is an apocalyptic number.

21253470960450 is an abundant number, since it is smaller than the sum of its proper divisors (31455137021838).

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

21253470960450 is a wasteful number, since it uses less digits than its factorization.

21253470960450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141689806418 (or 141689806413 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 21253470960450 in words is "twenty-one trillion, two hundred fifty-three billion, four hundred seventy million, nine hundred sixty thousand, four hundred fifty".