21053435235 has 16 divisors (see below), whose sum is σ = 38497710336. Its totient is φ = 9624427488.

The previous prime is 21053435191. The next prime is 21053435281. The reversal of 21053435235 is 53253435012.

It is not a de Polignac number, because 21053435235 - 2¹⁰ = 21053434211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21053435196 and 21053435205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100254349 + ... + 100254558.

It is an arithmetic number, because the mean of its divisors is an integer number (2406106896).

Almost surely, 2^21053435235 is an apocalyptic number.

21053435235 is a deficient number, since it is larger than the sum of its proper divisors (17444275101).

21053435235 is a wasteful number, since it uses less digits than its factorization.

21053435235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200508922.

The product of its (nonzero) digits is 54000, while the sum is 33.

The spelling of 21053435235 in words is "twenty-one billion, fifty-three million, four hundred thirty-five thousand, two hundred thirty-five".