20643062 has 16 divisors (see below), whose sum is σ = 33863184. Its totient is φ = 9360000.

The previous prime is 20643061. The next prime is 20643107. The reversal of 20643062 is 26034602.

It is a super-2 number, since 2×20643062² = 852272017471688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20643061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10562 + ... + 12362.

It is an arithmetic number, because the mean of its divisors is an integer number (2116449).

Almost surely, 2^20643062 is an apocalyptic number.

20643062 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20643062 is a deficient number, since it is larger than the sum of its proper divisors (13220122).

20643062 is a wasteful number, since it uses less digits than its factorization.

20643062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20643062 is about 4543.4636567271. The cubic root of 20643062 is about 274.3203580631.

Adding to 20643062 its reverse (26034602), we get a palindrome (46677664).

The spelling of 20643062 in words is "twenty million, six hundred forty-three thousand, sixty-two".