32196687421 has 4 divisors (see below), whose sum is σ = 32271390144. Its totient is φ = 32121984700.

The previous prime is 32196687409. The next prime is 32196687427. The reversal of 32196687421 is 12478669123.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12478669123 = 79 ⋅157957837.

It is a cyclic number.

It is not a de Polignac number, because 32196687421 - 2⁷ = 32196687293 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 (32196687427) 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, 37350715 + ... + 37351576.

It is an arithmetic number, because the mean of its divisors is an integer number (8067847536).

Almost surely, 2^32196687421 is an apocalyptic number.

It is an amenable number.

32196687421 is a deficient number, since it is larger than the sum of its proper divisors (74702723).

32196687421 is an equidigital number, since it uses as much as digits as its factorization.

32196687421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74702722.

The product of its digits is 870912, while the sum is 49.

The spelling of 32196687421 in words is "thirty-two billion, one hundred ninety-six million, six hundred eighty-seven thousand, four hundred twenty-one".