21010235000 has 40 divisors (see below), whose sum is σ = 49226992320. Its totient is φ = 8404092000.

The previous prime is 21010234951. The next prime is 21010235003. The reversal of 21010235000 is 53201012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010235003) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 2096024 + ... + 2106023.

It is an arithmetic number, because the mean of its divisors is an integer number (1230674808).

Almost surely, 2^21010235000 is an apocalyptic number.

21010235000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010235000 is an abundant number, since it is smaller than the sum of its proper divisors (28216757320).

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

21010235000 is an equidigital number, since it uses as much as digits as its factorization.

21010235000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202073 (or 4202054 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

Adding to 21010235000 its reverse (53201012), we get a palindrome (21063436012).

The spelling of 21010235000 in words is "twenty-one billion, ten million, two hundred thirty-five thousand".