21035510050 has 12 divisors (see below), whose sum is σ = 39126048786. Its totient is φ = 8414204000.

The previous prime is 21035510017. The next prime is 21035510057. The reversal of 21035510050 is 5001553012.

It can be written as a sum of positive squares in 3 ways, for example, as 19461087009 + 1574423041 = 139503^2 + 39679^2 .

It is not an unprimeable number, because it can be changed into a prime (21035510057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210355051 + ... + 210355150.

Almost surely, 2^21035510050 is an apocalyptic number.

21035510050 is a deficient number, since it is larger than the sum of its proper divisors (18090538736).

21035510050 is a wasteful number, since it uses less digits than its factorization.

21035510050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420710213 (or 420710208 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The spelling of 21035510050 in words is "twenty-one billion, thirty-five million, five hundred ten thousand, fifty".