20010155 has 16 divisors (see below), whose sum is σ = 26905824. Its totient is φ = 14158080.

The previous prime is 20010127. The next prime is 20010157. The reversal of 20010155 is 55101002.

It is not a de Polignac number, because 20010155 - 2²² = 15815851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20010157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2882 + ... + 6951.

It is an arithmetic number, because the mean of its divisors is an integer number (1681614).

Almost surely, 2^20010155 is an apocalyptic number.

20010155 is a deficient number, since it is larger than the sum of its proper divisors (6895669).

20010155 is a wasteful number, since it uses less digits than its factorization.

20010155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9886.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 20010155 is about 4473.2711744315. The cubic root of 20010155 is about 271.4876954042.

Adding to 20010155 its reverse (55101002), we get a palindrome (75111157).

The spelling of 20010155 in words is "twenty million, ten thousand, one hundred fifty-five".