21413001053 has 4 divisors (see below), whose sum is σ = 21413381340. Its totient is φ = 21412620768.

The previous prime is 21413001041. The next prime is 21413001061. The reversal of 21413001053 is 35010031412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6052373209 + 15360627844 = 77797^2 + 123938^2 .

It is a cyclic number.

It is not a de Polignac number, because 21413001053 - 2⁴ = 21413001037 is a prime.

It is a super-2 number, since 2×21413001053² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21413001073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87050 + ... + 224507.

It is an arithmetic number, because the mean of its divisors is an integer number (5353345335).

Almost surely, 2^21413001053 is an apocalyptic number.

It is an amenable number.

21413001053 is a deficient number, since it is larger than the sum of its proper divisors (380287).

21413001053 is an equidigital number, since it uses as much as digits as its factorization.

21413001053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380286.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21413001053 its reverse (35010031412), we get a palindrome (56423032465).

The spelling of 21413001053 in words is "twenty-one billion, four hundred thirteen million, one thousand, fifty-three".