21514032012 has 96 divisors (see below), whose sum is σ = 55396712448. Its totient is φ = 6444360000.

The previous prime is 21514031999. The next prime is 21514032037. The reversal of 21514032012 is 21023041512.

It is a self number, because there is not a number n which added to its sum of digits gives 21514032012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4683837 + ... + 4688427.

It is an arithmetic number, because the mean of its divisors is an integer number (577049088).

Almost surely, 2^21514032012 is an apocalyptic number.

21514032012 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 21514032012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27698356224).

21514032012 is an abundant number, since it is smaller than the sum of its proper divisors (33882680436).

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

21514032012 is a wasteful number, since it uses less digits than its factorization.

21514032012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011 (or 5009 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21514032012 its reverse (21023041512), we get a palindrome (42537073524).

The spelling of 21514032012 in words is "twenty-one billion, five hundred fourteen million, thirty-two thousand, twelve".