20153253 has 8 divisors (see below), whose sum is σ = 27011008. Its totient is φ = 13365504.

The previous prime is 20153251. The next prime is 20153291. The reversal of 20153253 is 35235102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20153253 - 2¹ = 20153251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16825 + ... + 17982.

It is an arithmetic number, because the mean of its divisors is an integer number (3376376).

Almost surely, 2^20153253 is an apocalyptic number.

It is an amenable number.

20153253 is a deficient number, since it is larger than the sum of its proper divisors (6857755).

20153253 is a wasteful number, since it uses less digits than its factorization.

20153253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35003.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20153253 is about 4489.2374630888. The cubic root of 20153253 is about 272.1333193394.

Adding to 20153253 its reverse (35235102), we get a palindrome (55388355).

The spelling of 20153253 in words is "twenty million, one hundred fifty-three thousand, two hundred fifty-three".