20553706 has 16 divisors (see below), whose sum is σ = 32988960. Its totient is φ = 9575280.

The previous prime is 20553703. The next prime is 20553707. The reversal of 20553706 is 60735502.

It is not an unprimeable number, because it can be changed into a prime (20553703) 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, 2116 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (2061810).

Almost surely, 2^20553706 is an apocalyptic number.

20553706 is a deficient number, since it is larger than the sum of its proper divisors (12435254).

20553706 is a wasteful number, since it uses less digits than its factorization.

20553706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8949.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 20553706 is about 4533.6195252800. The cubic root of 20553706 is about 273.9239759247.

The spelling of 20553706 in words is "twenty million, five hundred fifty-three thousand, seven hundred six".