20313519616 has 160 divisors (see below), whose sum is σ = 44868878208. Its totient is φ = 9130475520.

The previous prime is 20313519613. The next prime is 20313519617. The reversal of 20313519616 is 61691531302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313519613) 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, 47130921 + ... + 47131351.

Almost surely, 2^20313519616 is an apocalyptic number.

20313519616 is a gapful number since it is divisible by the number (26) 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 20313519616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22434439104).

20313519616 is an abundant number, since it is smaller than the sum of its proper divisors (24555358592).

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

20313519616 is an equidigital number, since it uses as much as digits as its factorization.

20313519616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 20313519616 in words is "twenty billion, three hundred thirteen million, five hundred nineteen thousand, six hundred sixteen".