6318720020 has 12 divisors (see below), whose sum is σ = 13269312084. Its totient is φ = 2527488000.

The previous prime is 6318719999. The next prime is 6318720041. The reversal of 6318720020 is 200278136.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6318719999) and next prime (6318720041).

It can be written as a sum of positive squares in 2 ways, for example, as 2131853584 + 4186866436 = 46172^2 + 64706^2 .

It is a super-2 number, since 2×6318720020² = 79852445382297600800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157967981 + ... + 157968020.

It is an arithmetic number, because the mean of its divisors is an integer number (1105776007).

Almost surely, 2^6318720020 is an apocalyptic number.

It is an amenable number.

6318720020 is an abundant number, since it is smaller than the sum of its proper divisors (6950592064).

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

6318720020 is a wasteful number, since it uses less digits than its factorization.

6318720020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315936010 (or 315936008 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 6318720020 is about 79490.3769018615. The cubic root of 6318720020 is about 1848.7422685668.

Adding to 6318720020 its reverse (200278136), we get a palindrome (6518998156).

The spelling of 6318720020 in words is "six billion, three hundred eighteen million, seven hundred twenty thousand, twenty".