21273097230 has 768 divisors, whose sum is σ = 76082872320. Its totient is φ = 4149273600.

The previous prime is 21273097207. The next prime is 21273097247. The reversal of 21273097230 is 3279037212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 360560941 + ... + 360560999.

It is an arithmetic number, because the mean of its divisors is an integer number (99066240).

Almost surely, 2^21273097230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21273097230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38041436160).

21273097230 is an abundant number, since it is smaller than the sum of its proper divisors (54809775090).

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

21273097230 is a wasteful number, since it uses less digits than its factorization.

21273097230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The spelling of 21273097230 in words is "twenty-one billion, two hundred seventy-three million, ninety-seven thousand, two hundred thirty".