21340022044 has 12 divisors (see below), whose sum is σ = 40740042168. Its totient is φ = 9700010000.

The previous prime is 21340022027. The next prime is 21340022087. The reversal of 21340022044 is 44022004312.

It is a happy number.

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

It is a congruent number.

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, 242500207 + ... + 242500294.

It is an arithmetic number, because the mean of its divisors is an integer number (3395003514).

Almost surely, 2^21340022044 is an apocalyptic number.

It is an amenable number.

21340022044 is a deficient number, since it is larger than the sum of its proper divisors (19400020124).

21340022044 is a wasteful number, since it uses less digits than its factorization.

21340022044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485000516 (or 485000514 counting only the distinct ones).

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

Adding to 21340022044 its reverse (44022004312), we get a palindrome (65362026356).

The spelling of 21340022044 in words is "twenty-one billion, three hundred forty million, twenty-two thousand, forty-four".