20153155 has 12 divisors (see below), whose sum is σ = 26582976. Its totient is φ = 14656400.

The previous prime is 20153153. The next prime is 20153191. The reversal of 20153155 is 55135102.

It is not a de Polignac number, because 20153155 - 2¹ = 20153153 is a prime.

It is a super-2 number, since 2×20153155² = 812299312908050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20153153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16051 + ... + 17260.

It is an arithmetic number, because the mean of its divisors is an integer number (2215248).

Almost surely, 2^20153155 is an apocalyptic number.

20153155 is a deficient number, since it is larger than the sum of its proper divisors (6429821).

20153155 is a wasteful number, since it uses less digits than its factorization.

20153155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33338 (or 33327 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 20153155 is about 4489.2265480815. The cubic root of 20153155 is about 272.1328782342.

Adding to 20153155 its reverse (55135102), we get a palindrome (75288257).

The spelling of 20153155 in words is "twenty million, one hundred fifty-three thousand, one hundred fifty-five".