21310001472 has 112 divisors (see below), whose sum is σ = 56955854592. Its totient is φ = 7031439360.

The previous prime is 21310001459. The next prime is 21310001497. The reversal of 21310001472 is 27410001312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11388697 + ... + 11390567.

It is an arithmetic number, because the mean of its divisors is an integer number (508534416).

Almost surely, 2^21310001472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21310001472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28477927296).

21310001472 is an abundant number, since it is smaller than the sum of its proper divisors (35645853120).

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

21310001472 is a wasteful number, since it uses less digits than its factorization.

21310001472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456 (or 2446 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

Adding to 21310001472 its reverse (27410001312), we get a palindrome (48720002784).

The spelling of 21310001472 in words is "twenty-one billion, three hundred ten million, one thousand, four hundred seventy-two".