51400414020 has 24 divisors (see below), whose sum is σ = 143921159424. Its totient is φ = 13706777056.

The previous prime is 51400413991. The next prime is 51400414033. The reversal of 51400414020 is 2041400415.

It is a happy number.

It is a super-2 number, since 2×51400414020² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428336724 + ... + 428336843.

It is an arithmetic number, because the mean of its divisors is an integer number (5996714976).

Almost surely, 2^51400414020 is an apocalyptic number.

It is an amenable number.

51400414020 is an abundant number, since it is smaller than the sum of its proper divisors (92520745404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51400414020 is a wasteful number, since it uses less digits than its factorization.

51400414020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856673579 (or 856673577 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 51400414020 its reverse (2041400415), we get a palindrome (53441814435).

The spelling of 51400414020 in words is "fifty-one billion, four hundred million, four hundred fourteen thousand, twenty".