20425007146 has 16 divisors (see below), whose sum is σ = 31491919368. Its totient is φ = 9929401600.

The previous prime is 20425007117. The next prime is 20425007149. The reversal of 20425007146 is 64170052402.

It can be written as a sum of positive squares in 4 ways, for example, as 20317366521 + 107640625 = 142539^2 + 10375^2 .

It is a super-3 number, since 3×20425007146³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20425007149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401035 + ... + 449086.

Almost surely, 2^20425007146 is an apocalyptic number.

20425007146 is a deficient number, since it is larger than the sum of its proper divisors (11066912222).

20425007146 is a wasteful number, since it uses less digits than its factorization.

20425007146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850457.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 20425007146 its reverse (64170052402), we get a palindrome (84595059548).

The spelling of 20425007146 in words is "twenty billion, four hundred twenty-five million, seven thousand, one hundred forty-six".