20553711 has 8 divisors (see below), whose sum is σ = 27988224. Its totient is φ = 13410840.

The previous prime is 20553707. The next prime is 20553727. The reversal of 20553711 is 11735502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20553711 - 2² = 20553707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72745 + ... + 73026.

It is an arithmetic number, because the mean of its divisors is an integer number (3498528).

Almost surely, 2^20553711 is an apocalyptic number.

20553711 is a deficient number, since it is larger than the sum of its proper divisors (7434513).

20553711 is a wasteful number, since it uses less digits than its factorization.

20553711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145821.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 20553711 is about 4533.6200767157. The cubic root of 20553711 is about 273.9239981367.

The spelling of 20553711 in words is "twenty million, five hundred fifty-three thousand, seven hundred eleven".