21630127893 has 32 divisors (see below), whose sum is σ = 31924851840. Its totient is φ = 12917667840.

The previous prime is 21630127861. The next prime is 21630127907. The reversal of 21630127893 is 39872103612.

It is not a de Polignac number, because 21630127893 - 2⁵ = 21630127861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21630127093) 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, 628353 + ... + 661881.

It is an arithmetic number, because the mean of its divisors is an integer number (997651620).

Almost surely, 2^21630127893 is an apocalyptic number.

It is an amenable number.

21630127893 is a deficient number, since it is larger than the sum of its proper divisors (10294723947).

21630127893 is a wasteful number, since it uses less digits than its factorization.

21630127893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33829.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 21630127893 in words is "twenty-one billion, six hundred thirty million, one hundred twenty-seven thousand, eight hundred ninety-three".