20049910920 has 384 divisors, whose sum is σ = 73139189760. Its totient is φ = 4730019840.

The previous prime is 20049910901. The next prime is 20049910927. The reversal of 20049910920 is 2901994002.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20049910927) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16393429 + ... + 16394651.

It is an arithmetic number, because the mean of its divisors is an integer number (190466640).

Almost surely, 2^20049910920 is an apocalyptic number.

20049910920 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 20049910920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36569594880).

20049910920 is an abundant number, since it is smaller than the sum of its proper divisors (53089278840).

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

20049910920 is a wasteful number, since it uses less digits than its factorization.

20049910920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 20049910920 in words is "twenty billion, forty-nine million, nine hundred ten thousand, nine hundred twenty".