21035051500 has 24 divisors (see below), whose sum is σ = 45940553568. Its totient is φ = 8414020400.

The previous prime is 21035051461. The next prime is 21035051533. The reversal of 21035051500 is 515053012.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21034552 + ... + 21035551.

It is an arithmetic number, because the mean of its divisors is an integer number (1914189732).

Almost surely, 2^21035051500 is an apocalyptic number.

21035051500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21035051500 is an abundant number, since it is smaller than the sum of its proper divisors (24905502068).

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

21035051500 is a wasteful number, since it uses less digits than its factorization.

21035051500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42070122 (or 42070110 counting only the distinct ones).

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

The spelling of 21035051500 in words is "twenty-one billion, thirty-five million, fifty-one thousand, five hundred".