20435513500 has 96 divisors (see below), whose sum is σ = 45765720000. Its totient is φ = 7967232000.

The previous prime is 20435513419. The next prime is 20435513513. The reversal of 20435513500 is 531553402.

It is a super-2 number, since 2×20435513500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16360876 + ... + 16362124.

It is an arithmetic number, because the mean of its divisors is an integer number (476726250).

Almost surely, 2^20435513500 is an apocalyptic number.

20435513500 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 20435513500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22882860000).

20435513500 is an abundant number, since it is smaller than the sum of its proper divisors (25330206500).

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

20435513500 is a wasteful number, since it uses less digits than its factorization.

20435513500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072 (or 2060 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 20435513500 in words is "twenty billion, four hundred thirty-five million, five hundred thirteen thousand, five hundred".