21412423440 has 160 divisors (see below), whose sum is σ = 78092501760. Its totient is φ = 5374089216.

The previous prime is 21412423427. The next prime is 21412423463. The reversal of 21412423440 is 4432421412.

21412423440 is a `hidden beast` number, since 214 + 1 + 2 + 4 + 2 + 3 + 440 = 666.

It is a super-2 number, since 2×21412423440² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254844 + ... + 328283.

It is an arithmetic number, because the mean of its divisors is an integer number (488078136).

Almost surely, 2^21412423440 is an apocalyptic number.

21412423440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21412423440 is an abundant number, since it is smaller than the sum of its proper divisors (56680078320).

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

21412423440 is a wasteful number, since it uses less digits than its factorization.

21412423440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583166 (or 583154 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21412423440 its reverse (4432421412), we get a palindrome (25844844852).

The spelling of 21412423440 in words is "twenty-one billion, four hundred twelve million, four hundred twenty-three thousand, four hundred forty".