20266667001 has 18 divisors (see below), whose sum is σ = 34053516042. Its totient is φ = 11580952320.

The previous prime is 20266666999. The next prime is 20266667027. The reversal of 20266667001 is 10076666202.

It can be written as a sum of positive squares in only one way, i.e., 18312584976 + 1954082025 = 135324^2 + 44205^2 .

It is not a de Polignac number, because 20266667001 - 2¹ = 20266666999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20266667801) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22977640 + ... + 22978521.

Almost surely, 2^20266667001 is an apocalyptic number.

20266667001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20266667001 is a deficient number, since it is larger than the sum of its proper divisors (13786849041).

20266667001 is a wasteful number, since it uses less digits than its factorization.

20266667001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45956181 (or 45956171 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 20266667001 in words is "twenty billion, two hundred sixty-six million, six hundred sixty-seven thousand, one".