40420421332 has 12 divisors (see below), whose sum is σ = 70737147936. Its totient is φ = 20209807640.

The previous prime is 40420421323. The next prime is 40420421369. The reversal of 40420421332 is 23312402404.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40420421297 and 40420421306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321843 + ... + 429445.

It is an arithmetic number, because the mean of its divisors is an integer number (5894762328).

Almost surely, 2^40420421332 is an apocalyptic number.

It is an amenable number.

40420421332 is a deficient number, since it is larger than the sum of its proper divisors (30316726604).

40420421332 is a wasteful number, since it uses less digits than its factorization.

40420421332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201518 (or 201516 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 40420421332 its reverse (23312402404), we get a palindrome (63732823736).

The spelling of 40420421332 in words is "forty billion, four hundred twenty million, four hundred twenty-one thousand, three hundred thirty-two".