21131441304 has 16 divisors (see below), whose sum is σ = 52828603320. Its totient is φ = 7043813760.

The previous prime is 21131441297. The next prime is 21131441311. The reversal of 21131441304 is 40314413112.

It is an interprime number because it is at equal distance from previous prime (21131441297) and next prime (21131441311).

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 880476721 = 21131441304 / (2 + 1 + 1 + 3 + 1 + 4 + 4 + 1 + 3 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440238337 + ... + 440238384.

Almost surely, 2^21131441304 is an apocalyptic number.

21131441304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21131441304 is an abundant number, since it is smaller than the sum of its proper divisors (31697162016).

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

21131441304 is a wasteful number, since it uses less digits than its factorization.

21131441304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880476730 (or 880476726 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21131441304 its reverse (40314413112), we get a palindrome (61445854416).

The spelling of 21131441304 in words is "twenty-one billion, one hundred thirty-one million, four hundred forty-one thousand, three hundred four".