21026476850 has 24 divisors (see below), whose sum is σ = 39116897028. Its totient is φ = 8408945600.

The previous prime is 21026476811. The next prime is 21026476853. The reversal of 21026476850 is 5867462012.

It can be written as a sum of positive squares in 6 ways, for example, as 19438215241 + 1588261609 = 139421^2 + 39853^2 .

It is a super-2 number, since 2×21026476850² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21026476798 and 21026476807.

It is not an unprimeable number, because it can be changed into a prime (21026476853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235460 + ... + 312240.

Almost surely, 2^21026476850 is an apocalyptic number.

21026476850 is a deficient number, since it is larger than the sum of its proper divisors (18090420178).

21026476850 is a wasteful number, since it uses less digits than its factorization.

21026476850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82270 (or 82265 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 21026476850 in words is "twenty-one billion, twenty-six million, four hundred seventy-six thousand, eight hundred fifty".