40002020425 has 12 divisors (see below), whose sum is σ = 52520300316. Its totient is φ = 30119168000.

The previous prime is 40002020393. The next prime is 40002020437. The reversal of 40002020425 is 52402020004.

It can be written as a sum of positive squares in 6 ways, for example, as 10419984 + 39991600441 = 3228^2 + 199979^2 .

It is not a de Polignac number, because 40002020425 - 2⁵ = 40002020393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47060776 + ... + 47061625.

It is an arithmetic number, because the mean of its divisors is an integer number (4376691693).

Almost surely, 2^40002020425 is an apocalyptic number.

It is an amenable number.

40002020425 is a deficient number, since it is larger than the sum of its proper divisors (12518279891).

40002020425 is a wasteful number, since it uses less digits than its factorization.

40002020425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94122428 (or 94122423 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

Adding to 40002020425 its reverse (52402020004), we get a palindrome (92404040429).

The spelling of 40002020425 in words is "forty billion, two million, twenty thousand, four hundred twenty-five".