20552007 has 16 divisors (see below), whose sum is σ = 31496192. Its totient is φ = 11676960.

The previous prime is 20551987. The next prime is 20552009. The reversal of 20552007 is 70025502.

It is not a de Polignac number, because 20552007 - 2⁶ = 20551943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (1968512).

Almost surely, 2^20552007 is an apocalyptic number.

20552007 is a deficient number, since it is larger than the sum of its proper divisors (10944185).

20552007 is a wasteful number, since it uses less digits than its factorization.

20552007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5598.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 20552007 is about 4533.4321435310. The cubic root of 20552007 is about 273.9164280619.

Adding to 20552007 its reverse (70025502), we get a palindrome (90577509).

The spelling of 20552007 in words is "twenty million, five hundred fifty-two thousand, seven".