20447053 has 4 divisors (see below), whose sum is σ = 22305888. Its totient is φ = 18588220.

The previous prime is 20447003. The next prime is 20447057. The reversal of 20447053 is 35074402.

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 20447053 - 2²¹ = 18349901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20447057) 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, 929401 + ... + 929422.

It is an arithmetic number, because the mean of its divisors is an integer number (5576472).

Almost surely, 2^20447053 is an apocalyptic number.

It is an amenable number.

20447053 is a deficient number, since it is larger than the sum of its proper divisors (1858835).

20447053 is a wasteful number, since it uses less digits than its factorization.

20447053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858834.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20447053 is about 4521.8417707832. The cubic root of 20447053 is about 273.4493576768.

The spelling of 20447053 in words is "twenty million, four hundred forty-seven thousand, fifty-three".