21847426146 has 144 divisors (see below), whose sum is σ = 61489157184. Its totient is φ = 5458549824.

The previous prime is 21847426103. The next prime is 21847426157. The reversal of 21847426146 is 64162474812.

21847426146 is a `hidden beast` number, since 2 + 1 + 84 + 7 + 426 + 146 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 572845 + ... + 609791.

It is an arithmetic number, because the mean of its divisors is an integer number (427008036).

Almost surely, 2^21847426146 is an apocalyptic number.

21847426146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21847426146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30744578592).

21847426146 is an abundant number, since it is smaller than the sum of its proper divisors (39641731038).

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

21847426146 is a wasteful number, since it uses less digits than its factorization.

21847426146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37013 (or 36991 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The spelling of 21847426146 in words is "twenty-one billion, eight hundred forty-seven million, four hundred twenty-six thousand, one hundred forty-six".