21320414120 has 16 divisors (see below), whose sum is σ = 47970931860. Its totient is φ = 8528165632.

The previous prime is 21320414117. The next prime is 21320414123. The reversal of 21320414120 is 2141402312.

It is an interprime number because it is at equal distance from previous prime (21320414117) and next prime (21320414123).

It can be written as a sum of positive squares in 2 ways, for example, as 19203862084 + 2116552036 = 138578^2 + 46006^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21320414092 and 21320414101.

It is not an unprimeable number, because it can be changed into a prime (21320414123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266505137 + ... + 266505216.

Almost surely, 2^21320414120 is an apocalyptic number.

21320414120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320414120 is an abundant number, since it is smaller than the sum of its proper divisors (26650517740).

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

21320414120 is a wasteful number, since it uses less digits than its factorization.

21320414120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533010364 (or 533010360 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21320414120 its reverse (2141402312), we get a palindrome (23461816432).

The spelling of 21320414120 in words is "twenty-one billion, three hundred twenty million, four hundred fourteen thousand, one hundred twenty".