20319960 has 64 divisors (see below), whose sum is σ = 61267680. Its totient is φ = 5391360.

The previous prime is 20319931. The next prime is 20319989. The reversal of 20319960 is 6991302.

It is an interprime number because it is at equal distance from previous prime (20319931) and next prime (20319989).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37290 + ... + 37830.

Almost surely, 2^20319960 is an apocalyptic number.

20319960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20319960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30633840).

20319960 is an abundant number, since it is smaller than the sum of its proper divisors (40947720).

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

20319960 is a wasteful number, since it uses less digits than its factorization.

20319960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 20319960 is about 4507.7666310491. The cubic root of 20319960 is about 272.8816188961.

The spelling of 20319960 in words is "twenty million, three hundred nineteen thousand, nine hundred sixty".