21050599815358 has 16 divisors (see below), whose sum is σ = 33856511993280. Its totient is φ = 9780770128896.

The previous prime is 21050599815331. The next prime is 21050599815389. The reversal of 21050599815358 is 85351899505012.

It is a junction number, because it is equal to n+sod(n) for n = 21050599815296 and 21050599815305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3918575091 + ... + 3918580462.

It is an arithmetic number, because the mean of its divisors is an integer number (2116031999580).

Almost surely, 2^{21050599815358} is an apocalyptic number.

21050599815358 is a deficient number, since it is larger than the sum of its proper divisors (12805912177922).

21050599815358 is a wasteful number, since it uses less digits than its factorization.

21050599815358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7837155651.

The product of its (nonzero) digits is 19440000, while the sum is 61.

The spelling of 21050599815358 in words is "twenty-one trillion, fifty billion, five hundred ninety-nine million, eight hundred fifteen thousand, three hundred fifty-eight".