21230467552 has 144 divisors (see below), whose sum is σ = 51924136320. Its totient is φ = 8501068800.

The previous prime is 21230467543. The next prime is 21230467553. The reversal of 21230467552 is 25576403212.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230467553) 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 23 ways as a sum of consecutive naturals, for example, 1402102 + ... + 1417162.

It is an arithmetic number, because the mean of its divisors is an integer number (360584280).

Almost surely, 2^21230467552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21230467552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25962068160).

21230467552 is an abundant number, since it is smaller than the sum of its proper divisors (30693668768).

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

21230467552 is a wasteful number, since it uses less digits than its factorization.

21230467552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15145 (or 15130 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 21230467552 in words is "twenty-one billion, two hundred thirty million, four hundred sixty-seven thousand, five hundred fifty-two".