51002420005 has 32 divisors (see below), whose sum is σ = 66603709440. Its totient is φ = 37350512640.

The previous prime is 51002420003. The next prime is 51002420009. The reversal of 51002420005 is 50002420015.

It is not a de Polignac number, because 51002420005 - 2¹ = 51002420003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51002420003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1969119 + ... + 1994851.

It is an arithmetic number, because the mean of its divisors is an integer number (2081365920).

Almost surely, 2^51002420005 is an apocalyptic number.

It is an amenable number.

51002420005 is a deficient number, since it is larger than the sum of its proper divisors (15601289435).

51002420005 is a wasteful number, since it uses less digits than its factorization.

51002420005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26461.

The product of its (nonzero) digits is 400, while the sum is 19.

The spelling of 51002420005 in words is "fifty-one billion, two million, four hundred twenty thousand, five".