21270201432 has 16 divisors (see below), whose sum is σ = 53175503640. Its totient is φ = 7090067136.

The previous prime is 21270201413. The next prime is 21270201437. The reversal of 21270201432 is 23410207212.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 886258393 = 21270201432 / (2 + 1 + 2 + 7 + 0 + 2 + 0 + 1 + 4 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21270201437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443129173 + ... + 443129220.

Almost surely, 2^21270201432 is an apocalyptic number.

It is an amenable number.

21270201432 is an abundant number, since it is smaller than the sum of its proper divisors (31905302208).

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

21270201432 is a wasteful number, since it uses less digits than its factorization.

21270201432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886258402 (or 886258398 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

Adding to 21270201432 its reverse (23410207212), we get a palindrome (44680408644).

The spelling of 21270201432 in words is "twenty-one billion, two hundred seventy million, two hundred one thousand, four hundred thirty-two".