21432030331 has 8 divisors (see below), whose sum is σ = 22014742464. Its totient is φ = 20849500800.

The previous prime is 21432030307. The next prime is 21432030349. The reversal of 21432030331 is 13303023412.

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 21432030331 - 2²¹ = 21429933179 is a prime.

It is a super-2 number, since 2×21432030331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432030731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211731 + ... + 296131.

It is an arithmetic number, because the mean of its divisors is an integer number (2751842808).

Almost surely, 2^21432030331 is an apocalyptic number.

21432030331 is a deficient number, since it is larger than the sum of its proper divisors (582712133).

21432030331 is an equidigital number, since it uses as much as digits as its factorization.

21432030331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91301.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21432030331 its reverse (13303023412), we get a palindrome (34735053743).

The spelling of 21432030331 in words is "twenty-one billion, four hundred thirty-two million, thirty thousand, three hundred thirty-one".