21010405053 has 32 divisors (see below), whose sum is σ = 31288637952. Its totient is φ = 12430555200.

The previous prime is 21010405051. The next prime is 21010405057. The reversal of 21010405053 is 35050401012.

It is not a de Polignac number, because 21010405053 - 2¹ = 21010405051 is a prime.

It is a super-2 number, since 2×21010405053² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010405051) 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, 3795898 + ... + 3801428.

It is an arithmetic number, because the mean of its divisors is an integer number (977769936).

Almost surely, 2^21010405053 is an apocalyptic number.

It is an amenable number.

21010405053 is a deficient number, since it is larger than the sum of its proper divisors (10278232899).

21010405053 is a wasteful number, since it uses less digits than its factorization.

21010405053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8265.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 21010405053 its reverse (35050401012), we get a palindrome (56060806065).

The spelling of 21010405053 in words is "twenty-one billion, ten million, four hundred five thousand, fifty-three".