21627530679 has 16 divisors (see below), whose sum is σ = 30581418240. Its totient is φ = 13548689280.

The previous prime is 21627530641. The next prime is 21627530723. The reversal of 21627530679 is 97603572612.

It is not a de Polignac number, because 21627530679 - 2⁸ = 21627530423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21627530629) 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 15 ways as a sum of consecutive naturals, for example, 303849 + ... + 368210.

It is an arithmetic number, because the mean of its divisors is an integer number (1911338640).

Almost surely, 2^21627530679 is an apocalyptic number.

21627530679 is a deficient number, since it is larger than the sum of its proper divisors (8953887561).

21627530679 is a wasteful number, since it uses less digits than its factorization.

21627530679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672710.

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 21627530679 in words is "twenty-one billion, six hundred twenty-seven million, five hundred thirty thousand, six hundred seventy-nine".