21402032331 has 8 divisors (see below), whose sum is σ = 28537174224. Its totient is φ = 14267456000.

The previous prime is 21402032293. The next prime is 21402032339. The reversal of 21402032331 is 13323020412.

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 21402032331 - 2¹³ = 21402024139 is a prime.

It is a super-2 number, since 2×21402032331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21402032298 and 21402032307.

It is not an unprimeable number, because it can be changed into a prime (21402032339) 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, 43386 + ... + 211391.

It is an arithmetic number, because the mean of its divisors is an integer number (3567146778).

Almost surely, 2^21402032331 is an apocalyptic number.

21402032331 is a deficient number, since it is larger than the sum of its proper divisors (7135141893).

21402032331 is a wasteful number, since it uses less digits than its factorization.

21402032331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282781.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21402032331 its reverse (13323020412), we get a palindrome (34725052743).

The spelling of 21402032331 in words is "twenty-one billion, four hundred two million, thirty-two thousand, three hundred thirty-one".