21470655063 has 64 divisors (see below), whose sum is σ = 35446118400. Its totient is φ = 11365349760.

The previous prime is 21470655007. The next prime is 21470655067. The reversal of 21470655063 is 36055607412.

It is not a de Polignac number, because 21470655063 - 2⁹ = 21470654551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470655067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13195656 + ... + 13197282.

It is an arithmetic number, because the mean of its divisors is an integer number (553845600).

Almost surely, 2^21470655063 is an apocalyptic number.

21470655063 is a deficient number, since it is larger than the sum of its proper divisors (13975463337).

21470655063 is a wasteful number, since it uses less digits than its factorization.

21470655063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 21470655063 in words is "twenty-one billion, four hundred seventy million, six hundred fifty-five thousand, sixty-three".