20966253 has 64 divisors (see below), whose sum is σ = 38983680. Its totient is φ = 9676800.

The previous prime is 20966233. The next prime is 20966263. The reversal of 20966253 is 35266902.

It is not a de Polignac number, because 20966253 - 2⁶ = 20966189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20966203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74473 + ... + 74753.

It is an arithmetic number, because the mean of its divisors is an integer number (609120).

Almost surely, 2^20966253 is an apocalyptic number.

It is an amenable number.

20966253 is a deficient number, since it is larger than the sum of its proper divisors (18017427).

20966253 is a wasteful number, since it uses less digits than its factorization.

20966253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 20966253 is about 4578.8921149116. The cubic root of 20966253 is about 275.7445520314.

The spelling of 20966253 in words is "twenty million, nine hundred sixty-six thousand, two hundred fifty-three".