21192407015 has 16 divisors (see below), whose sum is σ = 27717082848. Its totient is φ = 15461222016.

The previous prime is 21192407011. The next prime is 21192407029. The reversal of 21192407015 is 51070429112.

It is a cyclic number.

It is not a de Polignac number, because 21192407015 - 2² = 21192407011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192407011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1958684 + ... + 1969473.

It is an arithmetic number, because the mean of its divisors is an integer number (1732317678).

Almost surely, 2^21192407015 is an apocalyptic number.

21192407015 is a deficient number, since it is larger than the sum of its proper divisors (6524675833).

21192407015 is a wasteful number, since it uses less digits than its factorization.

21192407015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928258.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 21192407015 in words is "twenty-one billion, one hundred ninety-two million, four hundred seven thousand, fifteen".