21432231013 has 8 divisors (see below), whose sum is σ = 22383193536. Its totient is φ = 20482862400.

The previous prime is 21432230969. The next prime is 21432231043. The reversal of 21432231013 is 31013223412.

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 21432231013 - 2¹³ = 21432222821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432231043) 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, 370948 + ... + 424813.

It is an arithmetic number, because the mean of its divisors is an integer number (2797899192).

Almost surely, 2^21432231013 is an apocalyptic number.

21432231013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21432231013 is a deficient number, since it is larger than the sum of its proper divisors (950962523).

21432231013 is a wasteful number, since it uses less digits than its factorization.

21432231013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796955.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21432231013 its reverse (31013223412), we get a palindrome (52445454425).

The spelling of 21432231013 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-one thousand, thirteen".