21344100354 has 48 divisors (see below), whose sum is σ = 47009394432. Its totient is φ = 6997519584.

The previous prime is 21344100353. The next prime is 21344100391. The reversal of 21344100354 is 45300144312.

It is a happy number.

21344100354 is a `hidden beast` number, since 213 + 4 + 410 + 0 + 35 + 4 = 666.

It is a super-3 number, since 3×21344100354³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21344100353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 773967 + ... + 801069.

It is an arithmetic number, because the mean of its divisors is an integer number (979362384).

Almost surely, 2^21344100354 is an apocalyptic number.

21344100354 is an abundant number, since it is smaller than the sum of its proper divisors (25665294078).

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

21344100354 is a wasteful number, since it uses less digits than its factorization.

21344100354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27831 (or 27828 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21344100354 its reverse (45300144312), we get a palindrome (66644244666).

The spelling of 21344100354 in words is "twenty-one billion, three hundred forty-four million, one hundred thousand, three hundred fifty-four".