20020316640 has 96 divisors (see below), whose sum is σ = 63088411680. Its totient is φ = 5336684544.

The previous prime is 20020316633. The next prime is 20020316647. The reversal of 20020316640 is 4661302002.

It is an interprime number because it is at equal distance from previous prime (20020316633) and next prime (20020316647).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20020316640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020316647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1543462 + ... + 1556378.

It is an arithmetic number, because the mean of its divisors is an integer number (657170955).

Almost surely, 2^20020316640 is an apocalyptic number.

20020316640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020316640 is an abundant number, since it is smaller than the sum of its proper divisors (43068095040).

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

20020316640 is a wasteful number, since it uses less digits than its factorization.

20020316640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16164 (or 16156 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20020316640 its reverse (4661302002), we get a palindrome (24681618642).

The spelling of 20020316640 in words is "twenty billion, twenty million, three hundred sixteen thousand, six hundred forty".