20666012001 has 8 divisors (see below), whose sum is σ = 28140952704. Its totient is φ = 13484206320.

The previous prime is 20666011969. The next prime is 20666012009. The reversal of 20666012001 is 10021066602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20666012001 - 2⁵ = 20666011969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20666012009) 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, 73283590 + ... + 73283871.

It is an arithmetic number, because the mean of its divisors is an integer number (3517619088).

Almost surely, 2^20666012001 is an apocalyptic number.

It is an amenable number.

20666012001 is a deficient number, since it is larger than the sum of its proper divisors (7474940703).

20666012001 is a wasteful number, since it uses less digits than its factorization.

20666012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146567511.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20666012001 its reverse (10021066602), we get a palindrome (30687078603).

It can be divided in two parts, 2066601 and 2001, that added together give a palindrome (2068602).

The spelling of 20666012001 in words is "twenty billion, six hundred sixty-six million, twelve thousand, one".