21434244204 has 48 divisors (see below), whose sum is σ = 53929572480. Its totient is φ = 6603615360.

The previous prime is 21434244197. The next prime is 21434244217. The reversal of 21434244204 is 40244243412.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1137114 + ... + 1155809.

It is an arithmetic number, because the mean of its divisors is an integer number (1123532760).

Almost surely, 2^21434244204 is an apocalyptic number.

It is an amenable number.

21434244204 is an abundant number, since it is smaller than the sum of its proper divisors (32495328276).

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

21434244204 is a wasteful number, since it uses less digits than its factorization.

21434244204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292990 (or 2292988 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 21434244204 its reverse (40244243412), we get a palindrome (61678487616).

It can be divided in two parts, 2143424 and 4204, that added together give a triangular number (2147628 = T₂₀₇₂).

The spelling of 21434244204 in words is "twenty-one billion, four hundred thirty-four million, two hundred forty-four thousand, two hundred four".