21470614530621 has 4 divisors (see below), whose sum is σ = 28627486040832. Its totient is φ = 14313743020412.

The previous prime is 21470614530601. The next prime is 21470614530643. The reversal of 21470614530621 is 12603541607412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21470614530621 - 2⁶ = 21470614530557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470614530601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3578435755101 + ... + 3578435755106.

It is an arithmetic number, because the mean of its divisors is an integer number (7156871510208).

Almost surely, 2^{21470614530621} is an apocalyptic number.

It is an amenable number.

21470614530621 is a deficient number, since it is larger than the sum of its proper divisors (7156871510211).

21470614530621 is an equidigital number, since it uses as much as digits as its factorization.

21470614530621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156871510210.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 21470614530621 in words is "twenty-one trillion, four hundred seventy billion, six hundred fourteen million, five hundred thirty thousand, six hundred twenty-one".