13235551020 has 144 divisors (see below), whose sum is σ = 42076262592. Its totient is φ = 3361290240.

The previous prime is 13235551013. The next prime is 13235551033. The reversal of 13235551020 is 2015553231.

It is a happy number.

13235551020 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 555 + 102 + 0 = 666.

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, 957760 + ... + 971480.

It is an arithmetic number, because the mean of its divisors is an integer number (292196268).

Almost surely, 2^13235551020 is an apocalyptic number.

13235551020 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 13235551020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21038131296).

13235551020 is an abundant number, since it is smaller than the sum of its proper divisors (28840711572).

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

13235551020 is a wasteful number, since it uses less digits than its factorization.

13235551020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13992 (or 13987 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 13235551020 in words is "thirteen billion, two hundred thirty-five million, five hundred fifty-one thousand, twenty".