21477437671533 has 8 divisors (see below), whose sum is σ = 28637390572896. Its totient is φ = 14317888275600.

The previous prime is 21477437671523. The next prime is 21477437671553. The reversal of 21477437671533 is 33517673477412.

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

It is not a de Polignac number, because 21477437671533 - 2⁹ = 21477437671021 is a prime.

It is a super-2 number, since 2×21477437671533² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477437671523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100752138 + ... + 100965083.

It is an arithmetic number, because the mean of its divisors is an integer number (3579673821612).

Almost surely, 2^{21477437671533} is an apocalyptic number.

It is an amenable number.

21477437671533 is a deficient number, since it is larger than the sum of its proper divisors (7159952901363).

21477437671533 is a wasteful number, since it uses less digits than its factorization.

21477437671533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201752715.

The product of its digits is 62233920, while the sum is 60.

The spelling of 21477437671533 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty-seven million, six hundred seventy-one thousand, five hundred thirty-three".