21144000302 has 4 divisors (see below), whose sum is σ = 31716000456. Its totient is φ = 10572000150.

The previous prime is 21144000271. The next prime is 21144000307. The reversal of 21144000302 is 20300044112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144000307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5286000074 + ... + 5286000077.

It is an arithmetic number, because the mean of its divisors is an integer number (7929000114).

Almost surely, 2^21144000302 is an apocalyptic number.

21144000302 is a deficient number, since it is larger than the sum of its proper divisors (10572000154).

21144000302 is a wasteful number, since it uses less digits than its factorization.

21144000302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572000153.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21144000302 its reverse (20300044112), we get a palindrome (41444044414).

The spelling of 21144000302 in words is "twenty-one billion, one hundred forty-four million, three hundred two", and thus it is an aban number.