15435000020 has 96 divisors (see below), whose sum is σ = 36695030400. Its totient is φ = 5402073600.

The previous prime is 15435000017. The next prime is 15435000023. The reversal of 15435000020 is 2000053451.

It is an interprime number because it is at equal distance from previous prime (15435000017) and next prime (15435000023).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 15434999956 and 15435000001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15435000023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2108126 + ... + 2115434.

It is an arithmetic number, because the mean of its divisors is an integer number (382239900).

Almost surely, 2^15435000020 is an apocalyptic number.

15435000020 is a gapful number since it is divisible by the number (10) 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 15435000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18347515200).

15435000020 is an abundant number, since it is smaller than the sum of its proper divisors (21260030380).

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

15435000020 is a wasteful number, since it uses less digits than its factorization.

15435000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7689 (or 7687 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 15435000020 its reverse (2000053451), we get a palindrome (17435053471).

The spelling of 15435000020 in words is "fifteen billion, four hundred thirty-five million, twenty", and thus it is an aban number.