6420524918 has 4 divisors (see below), whose sum is σ = 9630787380. Its totient is φ = 3210262458.

The previous prime is 6420524839. The next prime is 6420524939. The reversal of 6420524918 is 8194250246.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605131228 + ... + 1605131231.

It is an arithmetic number, because the mean of its divisors is an integer number (2407696845).

Almost surely, 2^6420524918 is an apocalyptic number.

6420524918 is a deficient number, since it is larger than the sum of its proper divisors (3210262462).

6420524918 is a wasteful number, since it uses less digits than its factorization.

6420524918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210262461.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 6420524918 is about 80128.1780524180. The cubic root of 6420524918 is about 1858.6181702980.

The spelling of 6420524918 in words is "six billion, four hundred twenty million, five hundred twenty-four thousand, nine hundred eighteen".