21002412053 has 32 divisors (see below), whose sum is σ = 24962826240. Its totient is φ = 17291278080.

The previous prime is 21002412037. The next prime is 21002412059. The reversal of 21002412053 is 35021420012.

It is a cyclic number.

It is not a de Polignac number, because 21002412053 - 2⁴ = 21002412037 is a prime.

It is a super-2 number, since 2×21002412053² (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 (21002412059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29210228 + ... + 29210946.

It is an arithmetic number, because the mean of its divisors is an integer number (780088320).

Almost surely, 2^21002412053 is an apocalyptic number.

It is an amenable number.

21002412053 is a deficient number, since it is larger than the sum of its proper divisors (3960414187).

21002412053 is a wasteful number, since it uses less digits than its factorization.

21002412053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577.

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

Adding to 21002412053 its reverse (35021420012), we get a palindrome (56023832065).

The spelling of 21002412053 in words is "twenty-one billion, two million, four hundred twelve thousand, fifty-three".