21477142559 has 16 divisors (see below), whose sum is σ = 22855919040. Its totient is φ = 20111462400.

The previous prime is 21477142501. The next prime is 21477142579. The reversal of 21477142559 is 95524177412.

It is not a de Polignac number, because 21477142559 - 2¹⁶ = 21477077023 is a prime.

It is a super-3 number, since 3×21477142559³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477142579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2784302 + ... + 2792004.

It is an arithmetic number, because the mean of its divisors is an integer number (1428494940).

Almost surely, 2^21477142559 is an apocalyptic number.

21477142559 is a deficient number, since it is larger than the sum of its proper divisors (1378776481).

21477142559 is a wasteful number, since it uses less digits than its factorization.

21477142559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530.

The product of its digits is 705600, while the sum is 47.

The spelling of 21477142559 in words is "twenty-one billion, four hundred seventy-seven million, one hundred forty-two thousand, five hundred fifty-nine".