20553069 has 4 divisors (see below), whose sum is σ = 27404096. Its totient is φ = 13702044.

The previous prime is 20553067. The next prime is 20553073. The reversal of 20553069 is 96035502.

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 not a de Polignac number, because 20553069 - 2¹ = 20553067 is a prime.

It is a super-2 number, since 2×20553069² = 844857290637522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553067) 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, 3425509 + ... + 3425514.

It is an arithmetic number, because the mean of its divisors is an integer number (6851024).

Almost surely, 2^20553069 is an apocalyptic number.

It is an amenable number.

20553069 is a deficient number, since it is larger than the sum of its proper divisors (6851027).

20553069 is an equidigital number, since it uses as much as digits as its factorization.

20553069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851026.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 20553069 is about 4533.5492718178. The cubic root of 20553069 is about 273.9211460802.

The spelling of 20553069 in words is "twenty million, five hundred fifty-three thousand, sixty-nine".