20552373 has 10 divisors (see below), whose sum is σ = 30701814. Its totient is φ = 13701528.

The previous prime is 20552359. The next prime is 20552417. The reversal of 20552373 is 37325502.

It can be written as a sum of positive squares in only one way, i.e., 20007729 + 544644 = 4473^2 + 738^2 .

It is not a de Polignac number, because 20552373 - 2⁵ = 20552341 is a prime.

It is a super-2 number, since 2×20552373² = 844800071862258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552333) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 126786 + ... + 126947.

Almost surely, 2^20552373 is an apocalyptic number.

It is an amenable number.

20552373 is a deficient number, since it is larger than the sum of its proper divisors (10149441).

20552373 is an equidigital number, since it uses as much as digits as its factorization.

20552373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253745 (or 253736 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 20552373 is about 4533.4725101185. The cubic root of 20552373 is about 273.9180540639.

Adding to 20552373 its reverse (37325502), we get a palindrome (57877875).

The spelling of 20552373 in words is "twenty million, five hundred fifty-two thousand, three hundred seventy-three".