20001541540 has 24 divisors (see below), whose sum is σ = 42281410752. Its totient is φ = 7947631200.

The previous prime is 20001541519. The next prime is 20001541601. The reversal of 20001541540 is 4514510002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3308494 + ... + 3314533.

It is an arithmetic number, because the mean of its divisors is an integer number (1761725448).

Almost surely, 2^20001541540 is an apocalyptic number.

20001541540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001541540 is an abundant number, since it is smaller than the sum of its proper divisors (22279869212).

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

20001541540 is a wasteful number, since it uses less digits than its factorization.

20001541540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6623187 (or 6623185 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The spelling of 20001541540 in words is "twenty billion, one million, five hundred forty-one thousand, five hundred forty".