20666012246 has 64 divisors (see below), whose sum is σ = 35148107520. Its totient is φ = 9032688000.

The previous prime is 20666012231. The next prime is 20666012249. The reversal of 20666012246 is 64221066602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20666012249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16705940 + ... + 16707176.

It is an arithmetic number, because the mean of its divisors is an integer number (549189180).

Almost surely, 2^20666012246 is an apocalyptic number.

20666012246 is a deficient number, since it is larger than the sum of its proper divisors (14482095274).

20666012246 is a wasteful number, since it uses less digits than its factorization.

20666012246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 20666012246 its reverse (64221066602), we get a palindrome (84887078848).

The spelling of 20666012246 in words is "twenty billion, six hundred sixty-six million, twelve thousand, two hundred forty-six".