21735019850 has 24 divisors (see below), whose sum is σ = 40632369228. Its totient is φ = 8649872000.

The previous prime is 21735019837. The next prime is 21735019883. The reversal of 21735019850 is 5891053712.

It can be written as a sum of positive squares in 6 ways, for example, as 19426505641 + 2308514209 = 139379^2 + 48047^2 .

It is a super-2 number, since 2×21735019850² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21735019798 and 21735019807.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1093451 + ... + 1113150.

Almost surely, 2^21735019850 is an apocalyptic number.

21735019850 is a deficient number, since it is larger than the sum of its proper divisors (18897349378).

21735019850 is a wasteful number, since it uses less digits than its factorization.

21735019850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206810 (or 2206805 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 21735019850 in words is "twenty-one billion, seven hundred thirty-five million, nineteen thousand, eight hundred fifty".