21424404200232 has 64 divisors (see below), whose sum is σ = 58443838709760. Its totient is φ = 6490727537600.

The previous prime is 21424404200219. The next prime is 21424404200249. The reversal of 21424404200232 is 23200240442412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21424404200232.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8343144 + ... + 10604567.

It is an arithmetic number, because the mean of its divisors is an integer number (913184979840).

Almost surely, 2^{21424404200232} is an apocalyptic number.

21424404200232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21424404200232 is an abundant number, since it is smaller than the sum of its proper divisors (37019434509528).

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

21424404200232 is a wasteful number, since it uses less digits than its factorization.

21424404200232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18952014 (or 18952010 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 21424404200232 its reverse (23200240442412), we get a palindrome (44624644642644).

The spelling of 21424404200232 in words is "twenty-one trillion, four hundred twenty-four billion, four hundred four million, two hundred thousand, two hundred thirty-two".