155070020 has 96 divisors (see below), whose sum is σ = 396453120. Its totient is φ = 49766400.

The previous prime is 155070017. The next prime is 155070043. The reversal of 155070020 is 20070551.

It is a super-2 number, since 2×155070020² = 48093422205600800, which contains 22 as substring.

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 = 155069974 and 155070001.

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, 257720 + ... + 258320.

It is an arithmetic number, because the mean of its divisors is an integer number (4129720).

Almost surely, 2^155070020 is an apocalyptic number.

155070020 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 155070020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198226560).

155070020 is an abundant number, since it is smaller than the sum of its proper divisors (241383100).

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

155070020 is a wasteful number, since it uses less digits than its factorization.

155070020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 155070020 is about 12452.7113513483. The cubic root of 155070020 is about 537.2494105021.

The spelling of 155070020 in words is "one hundred fifty-five million, seventy thousand, twenty".