155340002020 has 96 divisors (see below), whose sum is σ = 392723251200. Its totient is φ = 50419615104.

The previous prime is 155340002011. The next prime is 155340002023. The reversal of 155340002020 is 20200043551.

It is a junction number, because it is equal to n+sod(n) for n = 155340001982 and 155340002000.

It is not an unprimeable number, because it can be changed into a prime (155340002023) 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, 3764661 + ... + 3805699.

It is an arithmetic number, because the mean of its divisors is an integer number (4090867200).

Almost surely, 2^155340002020 is an apocalyptic number.

155340002020 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 155340002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196361625600).

155340002020 is an abundant number, since it is smaller than the sum of its proper divisors (237383249180).

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

155340002020 is a wasteful number, since it uses less digits than its factorization.

155340002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42497 (or 42495 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 155340002020 its reverse (20200043551), we get a palindrome (175540045571).

The spelling of 155340002020 in words is "one hundred fifty-five billion, three hundred forty million, two thousand, twenty".