21893672507 has 16 divisors (see below), whose sum is σ = 26875776000. Its totient is φ = 17778315240.

The previous prime is 21893672497. The next prime is 21893672509. The reversal of 21893672507 is 70527639812.

It is not a de Polignac number, because 21893672507 - 2¹⁰ = 21893671483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21893672509) 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, 1673219 + ... + 1686252.

It is an arithmetic number, because the mean of its divisors is an integer number (1679736000).

Almost surely, 2^21893672507 is an apocalyptic number.

21893672507 is a deficient number, since it is larger than the sum of its proper divisors (4982103493).

21893672507 is an equidigital number, since it uses as much as digits as its factorization.

21893672507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359511 (or 3359497 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 21893672507 in words is "twenty-one billion, eight hundred ninety-three million, six hundred seventy-two thousand, five hundred seven".