2018962640 has 20 divisors (see below), whose sum is σ = 4694088324. Its totient is φ = 807585024.

The previous prime is 2018962607. The next prime is 2018962643. The reversal of 2018962640 is 462698102.

It can be written as a sum of positive squares in 2 ways, for example, as 1420083856 + 598878784 = 37684^2 + 24472^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2018962594 and 2018962603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018962643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12618437 + ... + 12618596.

Almost surely, 2^2018962640 is an apocalyptic number.

2018962640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2018962640 is an abundant number, since it is smaller than the sum of its proper divisors (2675125684).

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

2018962640 is a wasteful number, since it uses less digits than its factorization.

2018962640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25237046 (or 25237040 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 2018962640 is about 44932.8681479382. The cubic root of 2018962640 is about 1263.8904360782.

The spelling of 2018962640 in words is "two billion, eighteen million, nine hundred sixty-two thousand, six hundred forty".