40420404204431 has 4 divisors (see below), whose sum is σ = 40424199201864. Its totient is φ = 40416609207000.

The previous prime is 40420404204409. The next prime is 40420404204451. The reversal of 40420404204431 is 13440240402404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40420404204431 - 2³⁴ = 40403224335247 is a prime.

It is a super-2 number, since 2×40420404204431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420404204451) 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, 1897482740 + ... + 1897504041.

It is an arithmetic number, because the mean of its divisors is an integer number (10106049800466).

Almost surely, 2^{40420404204431} is an apocalyptic number.

40420404204431 is a deficient number, since it is larger than the sum of its proper divisors (3794997433).

40420404204431 is a wasteful number, since it uses less digits than its factorization.

40420404204431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794997432.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 40420404204431 its reverse (13440240402404), we get a palindrome (53860644606835).

The spelling of 40420404204431 in words is "forty trillion, four hundred twenty billion, four hundred four million, two hundred four thousand, four hundred thirty-one".