20941253 has 4 divisors (see below), whose sum is σ = 20964960. Its totient is φ = 20917548.

The previous prime is 20941243. The next prime is 20941259. The reversal of 20941253 is 35214902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20941253 - 2¹² = 20937157 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 (20941259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10475 + ... + 12312.

It is an arithmetic number, because the mean of its divisors is an integer number (5241240).

Almost surely, 2^20941253 is an apocalyptic number.

It is an amenable number.

20941253 is a deficient number, since it is larger than the sum of its proper divisors (23707).

20941253 is an equidigital number, since it uses as much as digits as its factorization.

20941253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23706.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20941253 is about 4576.1613826438. The cubic root of 20941253 is about 275.6349098749.

The spelling of 20941253 in words is "twenty million, nine hundred forty-one thousand, two hundred fifty-three".