21403143124 has 12 divisors (see below), whose sum is σ = 40860546048. Its totient is φ = 9728701400.

The previous prime is 21403143119. The next prime is 21403143127. The reversal of 21403143124 is 42134130412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403143127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243217492 + ... + 243217579.

It is an arithmetic number, because the mean of its divisors is an integer number (3405045504).

Almost surely, 2^21403143124 is an apocalyptic number.

It is an amenable number.

21403143124 is a deficient number, since it is larger than the sum of its proper divisors (19457402924).

21403143124 is a wasteful number, since it uses less digits than its factorization.

21403143124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486435086 (or 486435084 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21403143124 its reverse (42134130412), we get a palindrome (63537273536).

The spelling of 21403143124 in words is "twenty-one billion, four hundred three million, one hundred forty-three thousand, one hundred twenty-four".