21431433001 has 12 divisors (see below), whose sum is σ = 23568891696. Its totient is φ = 19473173720.

The previous prime is 21431432989. The next prime is 21431433011. The reversal of 21431433001 is 10033413412.

It is not a de Polignac number, because 21431433001 - 2⁷ = 21431432873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21431433011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198150 + ... + 286576.

It is an arithmetic number, because the mean of its divisors is an integer number (1964074308).

Almost surely, 2^21431433001 is an apocalyptic number.

It is an amenable number.

21431433001 is a deficient number, since it is larger than the sum of its proper divisors (2137458695).

21431433001 is a wasteful number, since it uses less digits than its factorization.

21431433001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90452 (or 90441 counting only the distinct ones).

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

Adding to 21431433001 its reverse (10033413412), we get a palindrome (31464846413).

The spelling of 21431433001 in words is "twenty-one billion, four hundred thirty-one million, four hundred thirty-three thousand, one".