21335702850 has 144 divisors (see below), whose sum is σ = 71466408000. Its totient is φ = 4433385600.

The previous prime is 21335702827. The next prime is 21335702873. The reversal of 21335702850 is 5820753312.

It is a happy number.

21335702850 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 570 + 2 + 85 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21335702827) and next prime (21335702873).

It is a super-2 number, since 2×21335702850² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 273225 + ... + 342524.

It is an arithmetic number, because the mean of its divisors is an integer number (496294500).

Almost surely, 2^21335702850 is an apocalyptic number.

21335702850 is an abundant number, since it is smaller than the sum of its proper divisors (50130705150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21335702850 is a wasteful number, since it uses less digits than its factorization.

21335702850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615785 (or 615777 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 21335702850 in words is "twenty-one billion, three hundred thirty-five million, seven hundred two thousand, eight hundred fifty".