21475433127 has 8 divisors (see below), whose sum is σ = 28639132416. Its totient is φ = 14314344632.

The previous prime is 21475433087. The next prime is 21475433131. The reversal of 21475433127 is 72133457412.

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 21475433127 - 2¹⁰ = 21475432103 is a prime.

It is a super-2 number, since 2×21475433127² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21475433167) 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, 633423 + ... + 666464.

It is an arithmetic number, because the mean of its divisors is an integer number (3579891552).

Almost surely, 2^21475433127 is an apocalyptic number.

21475433127 is a deficient number, since it is larger than the sum of its proper divisors (7163699289).

21475433127 is a wasteful number, since it uses less digits than its factorization.

21475433127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305397.

The product of its digits is 141120, while the sum is 39.

The spelling of 21475433127 in words is "twenty-one billion, four hundred seventy-five million, four hundred thirty-three thousand, one hundred twenty-seven".