21401525235 has 16 divisors (see below), whose sum is σ = 36044674560. Its totient is φ = 10813402080.

The previous prime is 21401525221. The next prime is 21401525279. The reversal of 21401525235 is 53252510412.

It is not a de Polignac number, because 21401525235 - 2⁷ = 21401525107 is a prime.

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, 37546251 + ... + 37546820.

It is an arithmetic number, because the mean of its divisors is an integer number (2252792160).

Almost surely, 2^21401525235 is an apocalyptic number.

21401525235 is a deficient number, since it is larger than the sum of its proper divisors (14643149325).

21401525235 is a wasteful number, since it uses less digits than its factorization.

21401525235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75093098.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21401525235 in words is "twenty-one billion, four hundred one million, five hundred twenty-five thousand, two hundred thirty-five".