21442210004 has 6 divisors (see below), whose sum is σ = 37523867514. Its totient is φ = 10721105000.

The previous prime is 21442209991. The next prime is 21442210033. The reversal of 21442210004 is 40001224412.

It can be written as a sum of positive squares in only one way, i.e., 21389647504 + 52562500 = 146252^2 + 7250^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680276247 + ... + 2680276254.

It is an arithmetic number, because the mean of its divisors is an integer number (6253977919).

Almost surely, 2^21442210004 is an apocalyptic number.

It is an amenable number.

21442210004 is a deficient number, since it is larger than the sum of its proper divisors (16081657510).

21442210004 is a wasteful number, since it uses less digits than its factorization.

21442210004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360552505 (or 5360552503 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21442210004 its reverse (40001224412), we get a palindrome (61443434416).

The spelling of 21442210004 in words is "twenty-one billion, four hundred forty-two million, two hundred ten thousand, four".