21463740420 has 96 divisors (see below), whose sum is σ = 62339397120. Its totient is φ = 5511313920.

The previous prime is 21463740377. The next prime is 21463740421. The reversal of 21463740420 is 2404736412.

It is not an unprimeable number, because it can be changed into a prime (21463740421) by changing a digit.

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, 632485 + ... + 665555.

It is an arithmetic number, because the mean of its divisors is an integer number (649368720).

Almost surely, 2^21463740420 is an apocalyptic number.

21463740420 is a gapful number since it is divisible by the number (20) 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 21463740420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31169698560).

21463740420 is an abundant number, since it is smaller than the sum of its proper divisors (40875656700).

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

21463740420 is a wasteful number, since it uses less digits than its factorization.

21463740420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33485 (or 33483 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The spelling of 21463740420 in words is "twenty-one billion, four hundred sixty-three million, seven hundred forty thousand, four hundred twenty".