21344200042 has 32 divisors (see below), whose sum is σ = 37296806400. Its totient is φ = 9065179200.

The previous prime is 21344200037. The next prime is 21344200057. The reversal of 21344200042 is 24000244312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21344199986 and 21344200022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519817 + ... + 559372.

It is an arithmetic number, because the mean of its divisors is an integer number (1165525200).

Almost surely, 2^21344200042 is an apocalyptic number.

21344200042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21344200042 is a deficient number, since it is larger than the sum of its proper divisors (15952606358).

21344200042 is a wasteful number, since it uses less digits than its factorization.

21344200042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079262.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21344200042 its reverse (24000244312), we get a palindrome (45344444354).

The spelling of 21344200042 in words is "twenty-one billion, three hundred forty-four million, two hundred thousand, forty-two".