21073143000 has 256 divisors, whose sum is σ = 80921917440. Its totient is φ = 4446144000.

The previous prime is 21073142989. The next prime is 21073143011. The reversal of 21073143000 is 34137012.

It is an interprime number because it is at equal distance from previous prime (21073142989) and next prime (21073143011).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 234405 + ... + 311595.

It is an arithmetic number, because the mean of its divisors is an integer number (316101240).

Almost surely, 2^21073143000 is an apocalyptic number.

21073143000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21073143000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40460958720).

21073143000 is an abundant number, since it is smaller than the sum of its proper divisors (59848774440).

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

21073143000 is a wasteful number, since it uses less digits than its factorization.

21073143000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77235 (or 77221 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The spelling of 21073143000 in words is "twenty-one billion, seventy-three million, one hundred forty-three thousand".