21320141424 has 40 divisors (see below), whose sum is σ = 55129074192. Its totient is φ = 7099998720.

The previous prime is 21320141417. The next prime is 21320141431. The reversal of 21320141424 is 42414102312.

It is an interprime number because it is at equal distance from previous prime (21320141417) and next prime (21320141431).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21320141394 and 21320141403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158389 + ... + 260244.

Almost surely, 2^21320141424 is an apocalyptic number.

21320141424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21320141424 is an abundant number, since it is smaller than the sum of its proper divisors (33808932768).

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

21320141424 is a wasteful number, since it uses less digits than its factorization.

21320141424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419705 (or 419699 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21320141424 its reverse (42414102312), we get a palindrome (63734243736).

The spelling of 21320141424 in words is "twenty-one billion, three hundred twenty million, one hundred forty-one thousand, four hundred twenty-four".