20004362546251 has 16 divisors (see below), whose sum is σ = 21872411382528. Its totient is φ = 18213575040000.

The previous prime is 20004362546249. The next prime is 20004362546261. The reversal of 20004362546251 is 15264526340002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20004362546251 - 2¹ = 20004362546249 is a prime.

It is a super-2 number, since 2×20004362546251² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004362546261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5566000 + ... + 8425501.

It is an arithmetic number, because the mean of its divisors is an integer number (1367025711408).

Almost surely, 2^{20004362546251} is an apocalyptic number.

20004362546251 is a deficient number, since it is larger than the sum of its proper divisors (1868048836277).

20004362546251 is a wasteful number, since it uses less digits than its factorization.

20004362546251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13994262.

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 20004362546251 its reverse (15264526340002), we get a palindrome (35268888886253).

The spelling of 20004362546251 in words is "twenty trillion, four billion, three hundred sixty-two million, five hundred forty-six thousand, two hundred fifty-one".