21470034135 has 64 divisors (see below), whose sum is σ = 39244455936. Its totient is φ = 9921436800.

The previous prime is 21470034133. The next prime is 21470034151. The reversal of 21470034135 is 53143007412.

It is a happy number.

It is not a de Polignac number, because 21470034135 - 2¹ = 21470034133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470034133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1063990 + ... + 1083980.

It is an arithmetic number, because the mean of its divisors is an integer number (613194624).

Almost surely, 2^21470034135 is an apocalyptic number.

21470034135 is a deficient number, since it is larger than the sum of its proper divisors (17774421801).

21470034135 is a wasteful number, since it uses less digits than its factorization.

21470034135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20316.

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 21470034135 in words is "twenty-one billion, four hundred seventy million, thirty-four thousand, one hundred thirty-five".