21424795392 has 864 divisors, whose sum is σ = 81837181440. Its totient is φ = 4799692800.

The previous prime is 21424795391. The next prime is 21424795393. The reversal of 21424795392 is 29359742412.

It is an interprime number because it is at equal distance from previous prime (21424795391) and next prime (21424795393).

It is a Harshad number since it is a multiple of its sum of digits (48).

Its product of digits (1088640) is a multiple of the sum of its prime divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424795391) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 691122417 + ... + 691122447.

It is an arithmetic number, because the mean of its divisors is an integer number (94718960).

Almost surely, 2^21424795392 is an apocalyptic number.

21424795392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21424795392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40918590720).

21424795392 is an abundant number, since it is smaller than the sum of its proper divisors (60412386048).

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

21424795392 is a wasteful number, since it uses less digits than its factorization.

21424795392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 96 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The spelling of 21424795392 in words is "twenty-one billion, four hundred twenty-four million, seven hundred ninety-five thousand, three hundred ninety-two".