21470061660514 has 4 divisors (see below), whose sum is σ = 32205092490774. Its totient is φ = 10735030830256.

The previous prime is 21470061660407. The next prime is 21470061660547. The reversal of 21470061660514 is 41506616007412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13227805370025 + 8242256290489 = 3637005^2 + 2870933^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5367515415127 + ... + 5367515415130.

Almost surely, 2^{21470061660514} is an apocalyptic number.

21470061660514 is a deficient number, since it is larger than the sum of its proper divisors (10735030830260).

21470061660514 is a wasteful number, since it uses less digits than its factorization.

21470061660514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10735030830259.

The product of its (nonzero) digits is 241920, while the sum is 43.

Adding to 21470061660514 its reverse (41506616007412), we get a palindrome (62976677667926).

The spelling of 21470061660514 in words is "twenty-one trillion, four hundred seventy billion, sixty-one million, six hundred sixty thousand, five hundred fourteen".