21124143036 has 24 divisors (see below), whose sum is σ = 54766297040. Its totient is φ = 7041380976.

The previous prime is 21124142983. The next prime is 21124143059. The reversal of 21124143036 is 63034142112.

It is a happy number.

21124143036 is a `hidden beast` number, since 211 + 2 + 414 + 3 + 0 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97796851 + ... + 97797066.

Almost surely, 2^21124143036 is an apocalyptic number.

It is an amenable number.

21124143036 is an abundant number, since it is smaller than the sum of its proper divisors (33642154004).

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

21124143036 is a wasteful number, since it uses less digits than its factorization.

21124143036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195593930 (or 195593922 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 21124143036 its reverse (63034142112), we get a palindrome (84158285148).

The spelling of 21124143036 in words is "twenty-one billion, one hundred twenty-four million, one hundred forty-three thousand, thirty-six".