21050570696 has 16 divisors (see below), whose sum is σ = 39533593200. Its totient is φ = 10508279184.

The previous prime is 21050570641. The next prime is 21050570699. The reversal of 21050570696 is 69607505012.

It is a super-4 number, since 4×21050570696⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21050570699) 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 3 ways as a sum of consecutive naturals, for example, 2120510 + ... + 2130413.

It is an arithmetic number, because the mean of its divisors is an integer number (2470849575).

Almost surely, 2^21050570696 is an apocalyptic number.

It is an amenable number.

21050570696 is a deficient number, since it is larger than the sum of its proper divisors (18483022504).

21050570696 is a wasteful number, since it uses less digits than its factorization.

21050570696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4251548 (or 4251544 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 21050570696 in words is "twenty-one billion, fifty million, five hundred seventy thousand, six hundred ninety-six".