21340030124 has 12 divisors (see below), whose sum is σ = 42680060304. Its totient is φ = 9145727184.

The previous prime is 21340030109. The next prime is 21340030157. The reversal of 21340030124 is 42103004312.

21340030124 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21340030096 and 21340030105.

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, 381071939 + ... + 381071994.

It is an arithmetic number, because the mean of its divisors is an integer number (3556671692).

Almost surely, 2^21340030124 is an apocalyptic number.

It is an amenable number.

21340030124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21340030124 is a wasteful number, since it uses less digits than its factorization.

21340030124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762143944 (or 762143942 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21340030124 its reverse (42103004312), we get a palindrome (63443034436).

The spelling of 21340030124 in words is "twenty-one billion, three hundred forty million, thirty thousand, one hundred twenty-four".