20299648920 has 128 divisors (see below), whose sum is σ = 62603893440. Its totient is φ = 5261967360.

The previous prime is 20299648861. The next prime is 20299648961. The reversal of 20299648920 is 2984699202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8314900 + ... + 8317340.

Almost surely, 2^20299648920 is an apocalyptic number.

20299648920 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 20299648920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31301946720).

20299648920 is an abundant number, since it is smaller than the sum of its proper divisors (42304244520).

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

20299648920 is a wasteful number, since it uses less digits than its factorization.

20299648920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 4361 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 20299648920 in words is "twenty billion, two hundred ninety-nine million, six hundred forty-eight thousand, nine hundred twenty".