21461609235 has 32 divisors (see below), whose sum is σ = 39088977408. Its totient is φ = 9953208320.

The previous prime is 21461609171. The next prime is 21461609243. The reversal of 21461609235 is 53290616412.

It is not a de Polignac number, because 21461609235 - 2⁶ = 21461609171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21461609193 and 21461609202.

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, 2823822 + ... + 2831411.

It is an arithmetic number, because the mean of its divisors is an integer number (1221530544).

Almost surely, 2^21461609235 is an apocalyptic number.

21461609235 is a deficient number, since it is larger than the sum of its proper divisors (17627368173).

21461609235 is a wasteful number, since it uses less digits than its factorization.

21461609235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655275.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 21461609235 in words is "twenty-one billion, four hundred sixty-one million, six hundred nine thousand, two hundred thirty-five".