21079437863 has 16 divisors (see below), whose sum is σ = 23186748960. Its totient is φ = 19004620800.

The previous prime is 21079437853. The next prime is 21079437947. The reversal of 21079437863 is 36873497012.

It is not a de Polignac number, because 21079437863 - 2⁸ = 21079437607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21079437803) 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, 631103 + ... + 663663.

It is an arithmetic number, because the mean of its divisors is an integer number (1449171810).

Almost surely, 2^21079437863 is an apocalyptic number.

21079437863 is a deficient number, since it is larger than the sum of its proper divisors (2107311097).

21079437863 is a wasteful number, since it uses less digits than its factorization.

21079437863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33058.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 21079437863 in words is "twenty-one billion, seventy-nine million, four hundred thirty-seven thousand, eight hundred sixty-three".