21103244364 has 24 divisors (see below), whose sum is σ = 49355163648. Its totient is φ = 7018091920.

The previous prime is 21103244363. The next prime is 21103244453. The reversal of 21103244364 is 46344230112.

It is not an unprimeable number, because it can be changed into a prime (21103244363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2034972 + ... + 2045315.

It is an arithmetic number, because the mean of its divisors is an integer number (2056465152).

Almost surely, 2^21103244364 is an apocalyptic number.

It is an amenable number.

21103244364 is an abundant number, since it is smaller than the sum of its proper divisors (28251919284).

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

21103244364 is a wasteful number, since it uses less digits than its factorization.

21103244364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080725 (or 4080723 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21103244364 its reverse (46344230112), we get a palindrome (67447474476).

The spelling of 21103244364 in words is "twenty-one billion, one hundred three million, two hundred forty-four thousand, three hundred sixty-four".