21442555342110 has 128 divisors (see below), whose sum is σ = 62286531379200. Its totient is φ = 4611887345664.

The previous prime is 21442555342037. The next prime is 21442555342111. The reversal of 21442555342110 is 1124355524412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442555342111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16506642 + ... + 17758218.

It is an arithmetic number, because the mean of its divisors is an integer number (486613526400).

Almost surely, 2^{21442555342110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21442555342110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31143265689600).

21442555342110 is an abundant number, since it is smaller than the sum of its proper divisors (40843976037090).

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

21442555342110 is a wasteful number, since it uses less digits than its factorization.

21442555342110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256410.

The product of its (nonzero) digits is 192000, while the sum is 39.

The spelling of 21442555342110 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty-five million, three hundred forty-two thousand, one hundred ten".