21000140298 has 32 divisors (see below), whose sum is σ = 49123137600. Its totient is φ = 6631622928.

The previous prime is 21000140297. The next prime is 21000140299. The reversal of 21000140298 is 89204100012.

21000140298 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21000140297) and next prime (21000140299).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21000140297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10232961 + ... + 10235012.

It is an arithmetic number, because the mean of its divisors is an integer number (1535098050).

Almost surely, 2^21000140298 is an apocalyptic number.

21000140298 is an abundant number, since it is smaller than the sum of its proper divisors (28122997302).

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

21000140298 is a wasteful number, since it uses less digits than its factorization.

21000140298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20468003 (or 20467997 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 21000140298 in words is "twenty-one billion, one hundred forty thousand, two hundred ninety-eight".