20496618912 has 192 divisors, whose sum is σ = 69996939264. Its totient is φ = 5092285440.

The previous prime is 20496618907. The next prime is 20496618913. The reversal of 20496618912 is 21981669402.

It is a super-2 number, since 2×20496618912² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (20496618913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109738 + ... + 230294.

It is an arithmetic number, because the mean of its divisors is an integer number (364567392).

Almost surely, 2^20496618912 is an apocalyptic number.

20496618912 is a gapful number since it is divisible by the number (22) 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 20496618912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34998469632).

20496618912 is an abundant number, since it is smaller than the sum of its proper divisors (49500320352).

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

20496618912 is a wasteful number, since it uses less digits than its factorization.

20496618912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120611 (or 120603 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 20496618912 in words is "twenty billion, four hundred ninety-six million, six hundred eighteen thousand, nine hundred twelve".