20003500020 has 48 divisors (see below), whose sum is σ = 64011201408. Its totient is φ = 4572228480.

The previous prime is 20003500009. The next prime is 20003500057. The reversal of 20003500020 is 2000530002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20003499969 and 20003500005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23813271 + ... + 23814110.

It is an arithmetic number, because the mean of its divisors is an integer number (1333566696).

Almost surely, 2^20003500020 is an apocalyptic number.

20003500020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003500020 is an abundant number, since it is smaller than the sum of its proper divisors (44007701388).

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

20003500020 is a wasteful number, since it uses less digits than its factorization.

20003500020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47627400 (or 47627398 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 12.

The spelling of 20003500020 in words is "twenty billion, three million, five hundred thousand, twenty".