21253054245606 has 48 divisors (see below), whose sum is σ = 46921757618736. Its totient is φ = 6949997316288.

The previous prime is 21253054245539. The next prime is 21253054245613. The reversal of 21253054245606 is 60654245035212.

21253054245606 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 3 + 0 + 542 + 45 + 60 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8599476 + ... + 10791528.

It is an arithmetic number, because the mean of its divisors is an integer number (977536617057).

Almost surely, 2^{21253054245606} is an apocalyptic number.

21253054245606 is an abundant number, since it is smaller than the sum of its proper divisors (25668703373130).

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

21253054245606 is a wasteful number, since it uses less digits than its factorization.

21253054245606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202277 (or 2202274 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 21253054245606 in words is "twenty-one trillion, two hundred fifty-three billion, fifty-four million, two hundred forty-five thousand, six hundred six".