21126465053 has 8 divisors (see below), whose sum is σ = 21182278656. Its totient is φ = 21070695600.

The previous prime is 21126465049. The next prime is 21126465071. The reversal of 21126465053 is 35056462112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21126465053 - 2² = 21126465049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21126465013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088948 + ... + 1108178.

It is an arithmetic number, because the mean of its divisors is an integer number (2647784832).

Almost surely, 2^21126465053 is an apocalyptic number.

It is an amenable number.

21126465053 is a deficient number, since it is larger than the sum of its proper divisors (55813603).

21126465053 is a wasteful number, since it uses less digits than its factorization.

21126465053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22075.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 21126465053 in words is "twenty-one billion, one hundred twenty-six million, four hundred sixty-five thousand, fifty-three".