21053014530 has 32 divisors (see below), whose sum is σ = 50630177088. Its totient is φ = 5602699200.

The previous prime is 21053014471. The next prime is 21053014559. The reversal of 21053014530 is 3541035012.

It is a super-2 number, since 2×21053014530² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21053014530.

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, 699901 + ... + 729360.

It is an arithmetic number, because the mean of its divisors is an integer number (1582193034).

Almost surely, 2^21053014530 is an apocalyptic number.

21053014530 is an abundant number, since it is smaller than the sum of its proper divisors (29577162558).

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

21053014530 is a wasteful number, since it uses less digits than its factorization.

21053014530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429762.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 21053014530 its reverse (3541035012), we get a palindrome (24594049542).

The spelling of 21053014530 in words is "twenty-one billion, fifty-three million, fourteen thousand, five hundred thirty".