21021146514 has 32 divisors (see below), whose sum is σ = 46819160640. Its totient is φ = 6991223616.

The previous prime is 21021146501. The next prime is 21021146519. The reversal of 21021146514 is 41564112012.

21021146514 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 1 + 1 + 4 + 651 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21021146519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415447 + ... + 463290.

It is an arithmetic number, because the mean of its divisors is an integer number (1463098770).

Almost surely, 2^21021146514 is an apocalyptic number.

21021146514 is an abundant number, since it is smaller than the sum of its proper divisors (25798014126).

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

21021146514 is a wasteful number, since it uses less digits than its factorization.

21021146514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879191 (or 879185 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 21021146514 its reverse (41564112012), we get a palindrome (62585258526).

The spelling of 21021146514 in words is "twenty-one billion, twenty-one million, one hundred forty-six thousand, five hundred fourteen".