20670006 has 32 divisors (see below), whose sum is σ = 47386368. Its totient is φ = 5888160.

The previous prime is 20669941. The next prime is 20670007. The reversal of 20670006 is 60007602.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21496 + ... + 22436.

It is an arithmetic number, because the mean of its divisors is an integer number (1480824).

Almost surely, 2^20670006 is an apocalyptic number.

20670006 is an abundant number, since it is smaller than the sum of its proper divisors (26716362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20670006 is a wasteful number, since it uses less digits than its factorization.

20670006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20670006 is about 4546.4278285265. The cubic root of 20670006 is about 274.4396568098.

Adding to 20670006 its reverse (60007602), we get a palindrome (80677608).

The spelling of 20670006 in words is "twenty million, six hundred seventy thousand, six".