21471652227907 has 12 divisors (see below), whose sum is σ = 25586428789656. Its totient is φ = 17955388620960.

The previous prime is 21471652227871. The next prime is 21471652227913. The reversal of 21471652227907 is 70972225617412.

It is not a de Polignac number, because 21471652227907 - 2¹⁵ = 21471652195139 is a prime.

It is a super-2 number, since 2×21471652227907² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21471652221907) 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 11 ways as a sum of consecutive naturals, for example, 5343863653 + ... + 5343867670.

It is an arithmetic number, because the mean of its divisors is an integer number (2132202399138).

Almost surely, 2^{21471652227907} is an apocalyptic number.

21471652227907 is a deficient number, since it is larger than the sum of its proper divisors (4114776561749).

21471652227907 is a wasteful number, since it uses less digits than its factorization.

21471652227907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687731378 (or 10687731371 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 21471652227907 in words is "twenty-one trillion, four hundred seventy-one billion, six hundred fifty-two million, two hundred twenty-seven thousand, nine hundred seven".