21142443410 has 32 divisors (see below), whose sum is σ = 43321122432. Its totient is φ = 7353892480.

The previous prime is 21142443379. The next prime is 21142443451. The reversal of 21142443410 is 1434424112.

It is a self number, because there is not a number n which added to its sum of digits gives 21142443410.

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, 4175819 + ... + 4180878.

It is an arithmetic number, because the mean of its divisors is an integer number (1353785076).

Almost surely, 2^21142443410 is an apocalyptic number.

21142443410 is an abundant number, since it is smaller than the sum of its proper divisors (22178679022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21142443410 is a wasteful number, since it uses less digits than its factorization.

21142443410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8356738.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21142443410 its reverse (1434424112), we get a palindrome (22576867522).

The spelling of 21142443410 in words is "twenty-one billion, one hundred forty-two million, four hundred forty-three thousand, four hundred ten".