20994153 has 4 divisors (see below), whose sum is σ = 27992208. Its totient is φ = 13996100.

The previous prime is 20994151. The next prime is 20994179. The reversal of 20994153 is 35149902.

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 20994153 - 2¹ = 20994151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20994151) 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, 3499023 + ... + 3499028.

It is an arithmetic number, because the mean of its divisors is an integer number (6998052).

Almost surely, 2^20994153 is an apocalyptic number.

It is an amenable number.

20994153 is a deficient number, since it is larger than the sum of its proper divisors (6998055).

20994153 is an equidigital number, since it uses as much as digits as its factorization.

20994153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6998054.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 20994153 is about 4581.9376905410. The cubic root of 20994153 is about 275.8668098174.

The spelling of 20994153 in words is "twenty million, nine hundred ninety-four thousand, one hundred fifty-three".