20612854920 has 128 divisors (see below), whose sum is σ = 70860211200. Its totient is φ = 4699005696.

The previous prime is 20612854897. The next prime is 20612854931. The reversal of 20612854920 is 2945821602.

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, 285987 + ... + 350733.

It is an arithmetic number, because the mean of its divisors is an integer number (553595400).

Almost surely, 2^20612854920 is an apocalyptic number.

20612854920 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 20612854920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35430105600).

20612854920 is an abundant number, since it is smaller than the sum of its proper divisors (50247356280).

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

20612854920 is a wasteful number, since it uses less digits than its factorization.

20612854920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65147 (or 65143 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 20612854920 in words is "twenty billion, six hundred twelve million, eight hundred fifty-four thousand, nine hundred twenty".