21145450235 has 32 divisors (see below), whose sum is σ = 32074288512. Its totient is φ = 13022622720.

The previous prime is 21145450229. The next prime is 21145450243. The reversal of 21145450235 is 53205454112.

It is not a de Polignac number, because 21145450235 - 2⁴ = 21145450219 is a prime.

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, 611186 + ... + 644855.

It is an arithmetic number, because the mean of its divisors is an integer number (1002321516).

Almost surely, 2^21145450235 is an apocalyptic number.

21145450235 is a deficient number, since it is larger than the sum of its proper divisors (10928838277).

21145450235 is a wasteful number, since it uses less digits than its factorization.

21145450235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256103.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 21145450235 in words is "twenty-one billion, one hundred forty-five million, four hundred fifty thousand, two hundred thirty-five".