21424824930 has 32 divisors (see below), whose sum is σ = 51997334400. Its totient is φ = 5649091712.

The previous prime is 21424824901. The next prime is 21424824937. The reversal of 21424824930 is 3942842412.

It is a super-2 number, since 2×21424824930² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21424824937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4009470 + ... + 4014809.

It is an arithmetic number, because the mean of its divisors is an integer number (1624916700).

Almost surely, 2^21424824930 is an apocalyptic number.

21424824930 is an abundant number, since it is smaller than the sum of its proper divisors (30572509470).

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

21424824930 is a wasteful number, since it uses less digits than its factorization.

21424824930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8024378.

The product of its (nonzero) digits is 110592, while the sum is 39.

It can be divided in two parts, 2142482 and 4930, that added together give a palindrome (2147412).

The spelling of 21424824930 in words is "twenty-one billion, four hundred twenty-four million, eight hundred twenty-four thousand, nine hundred thirty".