20135603020 has 144 divisors (see below), whose sum is σ = 48434712480. Its totient is φ = 7008768000.

The previous prime is 20135603003. The next prime is 20135603099. The reversal of 20135603020 is 2030653102.

It is a junction number, because it is equal to n+sod(n) for n = 20135602982 and 20135603000.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15476370 + ... + 15477670.

It is an arithmetic number, because the mean of its divisors is an integer number (336352170).

Almost surely, 2^20135603020 is an apocalyptic number.

20135603020 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 20135603020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24217356240).

20135603020 is an abundant number, since it is smaller than the sum of its proper divisors (28299109460).

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

20135603020 is a wasteful number, since it uses less digits than its factorization.

20135603020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The spelling of 20135603020 in words is "twenty billion, one hundred thirty-five million, six hundred three thousand, twenty".