21467747080 has 128 divisors (see below), whose sum is σ = 53771558400. Its totient is φ = 7663795200.

The previous prime is 21467747069. The next prime is 21467747083. The reversal of 21467747080 is 8074776412.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21467747080.

It is not an unprimeable number, because it can be changed into a prime (21467747083) 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 31 ways as a sum of consecutive naturals, for example, 1865745 + ... + 1877215.

It is an arithmetic number, because the mean of its divisors is an integer number (420090300).

Almost surely, 2^21467747080 is an apocalyptic number.

21467747080 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 21467747080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26885779200).

21467747080 is an abundant number, since it is smaller than the sum of its proper divisors (32303811320).

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

21467747080 is a wasteful number, since it uses less digits than its factorization.

21467747080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11615 (or 11611 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 21467747080 in words is "twenty-one billion, four hundred sixty-seven million, seven hundred forty-seven thousand, eighty".