21253045352035 has 48 divisors (see below), whose sum is σ = 30983263801344. Its totient is φ = 13707017307648.

The previous prime is 21253045352027. The next prime is 21253045352051. The reversal of 21253045352035 is 53025354035212.

It is not a de Polignac number, because 21253045352035 - 2³ = 21253045352027 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14334502 + ... + 15747508.

It is an arithmetic number, because the mean of its divisors is an integer number (645484662528).

Almost surely, 2^{21253045352035} is an apocalyptic number.

21253045352035 is a deficient number, since it is larger than the sum of its proper divisors (9730218449309).

21253045352035 is a wasteful number, since it uses less digits than its factorization.

21253045352035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414540 (or 1414523 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 40.

Adding to 21253045352035 its reverse (53025354035212), we get a palindrome (74278399387247).

The spelling of 21253045352035 in words is "twenty-one trillion, two hundred fifty-three billion, forty-five million, three hundred fifty-two thousand, thirty-five".