21424210460040 has 64 divisors (see below), whose sum is σ = 68053374408960. Its totient is φ = 5377056742400.

The previous prime is 21424210460039. The next prime is 21424210460071. The reversal of 21424210460040 is 4006401242412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5251029936 + ... + 5251034015.

It is an arithmetic number, because the mean of its divisors is an integer number (1063333975140).

Almost surely, 2^{21424210460040} is an apocalyptic number.

21424210460040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21424210460040 is an abundant number, since it is smaller than the sum of its proper divisors (46629163948920).

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

21424210460040 is a wasteful number, since it uses less digits than its factorization.

21424210460040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10502063982 (or 10502063978 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The spelling of 21424210460040 in words is "twenty-one trillion, four hundred twenty-four billion, two hundred ten million, four hundred sixty thousand, forty".