20153238 has 16 divisors (see below), whose sum is σ = 46064640. Its totient is φ = 5758056.

The previous prime is 20153227. The next prime is 20153251. The reversal of 20153238 is 83235102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239878 + ... + 239961.

It is an arithmetic number, because the mean of its divisors is an integer number (2879040).

Almost surely, 2^20153238 is an apocalyptic number.

20153238 is an abundant number, since it is smaller than the sum of its proper divisors (25911402).

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

20153238 is a wasteful number, since it uses less digits than its factorization.

20153238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479851.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20153238 is about 4489.2357924261. The cubic root of 20153238 is about 272.1332518234.

It can be divided in two parts, 2015 and 3238, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 20153238 in words is "twenty million, one hundred fifty-three thousand, two hundred thirty-eight".