21533273127 has 24 divisors (see below), whose sum is σ = 31632400800. Its totient is φ = 14112624960.

The previous prime is 21533273123. The next prime is 21533273131. The reversal of 21533273127 is 72137233512.

21533273127 is a `hidden beast` number, since 2 + 1 + 5 + 332 + 7 + 312 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (21533273123) and next prime (21533273131).

It is not a de Polignac number, because 21533273127 - 2² = 21533273123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21533273091 and 21533273100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21533273123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174733 + ... + 271289.

It is an arithmetic number, because the mean of its divisors is an integer number (1318016700).

Almost surely, 2^21533273127 is an apocalyptic number.

21533273127 is a deficient number, since it is larger than the sum of its proper divisors (10099127673).

21533273127 is a wasteful number, since it uses less digits than its factorization.

21533273127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96983 (or 96980 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The spelling of 21533273127 in words is "twenty-one billion, five hundred thirty-three million, two hundred seventy-three thousand, one hundred twenty-seven".