21342044402 has 64 divisors (see below), whose sum is σ = 39353554944. Its totient is φ = 8482320000.

The previous prime is 21342044401. The next prime is 21342044461. The reversal of 21342044402 is 20444024312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21342044401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1891277 + ... + 1902527.

It is an arithmetic number, because the mean of its divisors is an integer number (614899296).

Almost surely, 2^21342044402 is an apocalyptic number.

21342044402 is a deficient number, since it is larger than the sum of its proper divisors (18011510542).

21342044402 is a wasteful number, since it uses less digits than its factorization.

21342044402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11463.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21342044402 its reverse (20444024312), we get a palindrome (41786068714).

The spelling of 21342044402 in words is "twenty-one billion, three hundred forty-two million, forty-four thousand, four hundred two".