20203774920 has 320 divisors, whose sum is σ = 78677723520. Its totient is φ = 4554372096.

The previous prime is 20203774919. The next prime is 20203774949. The reversal of 20203774920 is 2947730202.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1649539 + ... + 1661741.

It is an arithmetic number, because the mean of its divisors is an integer number (245867886).

Almost surely, 2^20203774920 is an apocalyptic number.

20203774920 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 20203774920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39338861760).

20203774920 is an abundant number, since it is smaller than the sum of its proper divisors (58473948600).

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

20203774920 is a wasteful number, since it uses less digits than its factorization.

20203774920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12306 (or 12293 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 20203774920 in words is "twenty billion, two hundred three million, seven hundred seventy-four thousand, nine hundred twenty".