20153190 has 32 divisors (see below), whose sum is σ = 48524256. Its totient is φ = 5356800.

The previous prime is 20153153. The next prime is 20153191. The reversal of 20153190 is 9135102.

20153190 = 20² + 21² + ... + 392².

It is a super-2 number, since 2×20153190² = 812302134352200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153191) 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, 10290 + ... + 12090.

It is an arithmetic number, because the mean of its divisors is an integer number (1516383).

Almost surely, 2^20153190 is an apocalyptic number.

20153190 is an abundant number, since it is smaller than the sum of its proper divisors (28371066).

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

20153190 is a wasteful number, since it uses less digits than its factorization.

20153190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 20153190 is about 4489.2304463015. The cubic root of 20153190 is about 272.1330357720.

Adding to 20153190 its reverse (9135102), we get a palindrome (29288292).

The spelling of 20153190 in words is "twenty million, one hundred fifty-three thousand, one hundred ninety".