21040014530 has 16 divisors (see below), whose sum is σ = 38011780224. Its totient is φ = 8384949360.

The previous prime is 21040014491. The next prime is 21040014539. The reversal of 21040014530 is 3541004012.

It is a super-2 number, since 2×21040014530² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21040014539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3879212 + ... + 3884631.

It is an arithmetic number, because the mean of its divisors is an integer number (2375736264).

Almost surely, 2^21040014530 is an apocalyptic number.

21040014530 is a deficient number, since it is larger than the sum of its proper divisors (16971765694).

21040014530 is a wasteful number, since it uses less digits than its factorization.

21040014530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7764121.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 21040014530 its reverse (3541004012), we get a palindrome (24581018542).

The spelling of 21040014530 in words is "twenty-one billion, forty million, fourteen thousand, five hundred thirty".