21477420432 has 120 divisors (see below), whose sum is σ = 66755325600. Its totient is φ = 6608414592.

The previous prime is 21477420421. The next prime is 21477420439. The reversal of 21477420432 is 23402477412.

21477420432 is a `hidden beast` number, since 214 + 7 + 7 + 4 + 2 + 0 + 432 = 666.

It is a super-2 number, since 2×21477420432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21477420439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74082 + ... + 220097.

It is an arithmetic number, because the mean of its divisors is an integer number (556294380).

Almost surely, 2^21477420432 is an apocalyptic number.

It is an amenable number.

21477420432 is an abundant number, since it is smaller than the sum of its proper divisors (45277905168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21477420432 is a wasteful number, since it uses less digits than its factorization.

21477420432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294222 (or 294197 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

Adding to 21477420432 its reverse (23402477412), we get a palindrome (44879897844).

The spelling of 21477420432 in words is "twenty-one billion, four hundred seventy-seven million, four hundred twenty thousand, four hundred thirty-two".