21202144034 has 8 divisors (see below), whose sum is σ = 31825108380. Its totient is φ = 10593774576.

The previous prime is 21202144013. The next prime is 21202144039. The reversal of 21202144034 is 43044120212.

It can be written as a sum of positive squares in 2 ways, for example, as 17836403809 + 3365740225 = 133553^2 + 58015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21202144039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3645089 + ... + 3650900.

Almost surely, 2^21202144034 is an apocalyptic number.

21202144034 is a deficient number, since it is larger than the sum of its proper divisors (10622964346).

21202144034 is a wasteful number, since it uses less digits than its factorization.

21202144034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7297444.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21202144034 its reverse (43044120212), we get a palindrome (64246264246).

The spelling of 21202144034 in words is "twenty-one billion, two hundred two million, one hundred forty-four thousand, thirty-four".