32434561821 has 4 divisors (see below), whose sum is σ = 43246082432. Its totient is φ = 21623041212.

The previous prime is 32434561813. The next prime is 32434561879. The reversal of 32434561821 is 12816543423.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 32434561821 - 2³ = 32434561813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 32434561821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32434561121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5405760301 + ... + 5405760306.

It is an arithmetic number, because the mean of its divisors is an integer number (10811520608).

Almost surely, 2^32434561821 is an apocalyptic number.

It is an amenable number.

32434561821 is a deficient number, since it is larger than the sum of its proper divisors (10811520611).

32434561821 is a wasteful number, since it uses less digits than its factorization.

32434561821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811520610.

The product of its digits is 138240, while the sum is 39.

The spelling of 32434561821 in words is "thirty-two billion, four hundred thirty-four million, five hundred sixty-one thousand, eight hundred twenty-one".