21214435053 has 32 divisors (see below), whose sum is σ = 32898021376. Its totient is φ = 11909291328.

The previous prime is 21214435007. The next prime is 21214435061. The reversal of 21214435053 is 35053441212.

It is not a de Polignac number, because 21214435053 - 2⁹ = 21214434541 is a prime.

It is a super-2 number, since 2×21214435053² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214435053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214435093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504600 + ... + 545022.

It is an arithmetic number, because the mean of its divisors is an integer number (1028063168).

Almost surely, 2^21214435053 is an apocalyptic number.

It is an amenable number.

21214435053 is a deficient number, since it is larger than the sum of its proper divisors (11683586323).

21214435053 is a wasteful number, since it uses less digits than its factorization.

21214435053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40873.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21214435053 its reverse (35053441212), we get a palindrome (56267876265).

The spelling of 21214435053 in words is "twenty-one billion, two hundred fourteen million, four hundred thirty-five thousand, fifty-three".