21847440747380 has 12 divisors (see below), whose sum is σ = 45879625569540. Its totient is φ = 8738976298944.

The previous prime is 21847440747347. The next prime is 21847440747439. The reversal of 21847440747380 is 8374704474812.

It can be written as a sum of positive squares in 2 ways, for example, as 6823149997456 + 15024290749924 = 2612116^2 + 3876118^2 .

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546186018665 + ... + 546186018704.

It is an arithmetic number, because the mean of its divisors is an integer number (3823302130795).

Almost surely, 2^{21847440747380} is an apocalyptic number.

21847440747380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21847440747380 is an abundant number, since it is smaller than the sum of its proper divisors (24032184822160).

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

21847440747380 is a wasteful number, since it uses less digits than its factorization.

21847440747380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092372037378 (or 1092372037376 counting only the distinct ones).

The product of its (nonzero) digits is 33718272, while the sum is 59.

The spelling of 21847440747380 in words is "twenty-one trillion, eight hundred forty-seven billion, four hundred forty million, seven hundred forty-seven thousand, three hundred eighty".