21602471052207 has 16 divisors (see below), whose sum is σ = 28887588576000. Its totient is φ = 14359511732544.

The previous prime is 21602471052193. The next prime is 21602471052247. The reversal of 21602471052207 is 70225017420612.

It is a happy number.

It is not a de Polignac number, because 21602471052207 - 2⁴ = 21602471052191 is a prime.

It is a super-2 number, since 2×21602471052207² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21602471052247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6271144 + ... + 9084722.

It is an arithmetic number, because the mean of its divisors is an integer number (1805474286000).

Almost surely, 2^{21602471052207} is an apocalyptic number.

21602471052207 is a deficient number, since it is larger than the sum of its proper divisors (7285117523793).

21602471052207 is a wasteful number, since it uses less digits than its factorization.

21602471052207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821070.

The product of its (nonzero) digits is 94080, while the sum is 39.

Adding to 21602471052207 its reverse (70225017420612), we get a palindrome (91827488472819).

The spelling of 21602471052207 in words is "twenty-one trillion, six hundred two billion, four hundred seventy-one million, fifty-two thousand, two hundred seven".