20153105 has 16 divisors (see below), whose sum is σ = 27713664. Its totient is φ = 13781760.

The previous prime is 20153101. The next prime is 20153117. The reversal of 20153105 is 50135102.

It is not a de Polignac number, because 20153105 - 2² = 20153101 is a prime.

It is a super-2 number, since 2×20153105² = 812295282282050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20153101) 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, 20270 + ... + 21240.

It is an arithmetic number, because the mean of its divisors is an integer number (1732104).

Almost surely, 2^20153105 is an apocalyptic number.

It is an amenable number.

20153105 is a deficient number, since it is larger than the sum of its proper divisors (7560559).

20153105 is an equidigital number, since it uses as much as digits as its factorization.

20153105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 20153105 is about 4489.2209791900. The cubic root of 20153105 is about 272.1326531801.

Adding to 20153105 its reverse (50135102), we get a palindrome (70288207).

The spelling of 20153105 in words is "twenty million, one hundred fifty-three thousand, one hundred five".