21881228034 has 8 divisors (see below), whose sum is σ = 43762456080. Its totient is φ = 7293742676.

The previous prime is 21881228023. The next prime is 21881228063. The reversal of 21881228034 is 43082218812.

It is a sphenic number, since it is the product of 3 distinct primes.

21881228034 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21881227983 and 21881228001.

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, 1823435664 + ... + 1823435675.

It is an arithmetic number, because the mean of its divisors is an integer number (5470307010).

Almost surely, 2^21881228034 is an apocalyptic number.

21881228034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21881228034 is a wasteful number, since it uses less digits than its factorization.

21881228034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646871344.

The product of its (nonzero) digits is 49152, while the sum is 39.

The spelling of 21881228034 in words is "twenty-one billion, eight hundred eighty-one million, two hundred twenty-eight thousand, thirty-four".