20670546 has 16 divisors (see below), whose sum is σ = 44521344. Its totient is φ = 6360144.

The previous prime is 20670523. The next prime is 20670547. The reversal of 20670546 is 64507602.

It is not an unprimeable number, because it can be changed into a prime (20670547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132426 + ... + 132581.

It is an arithmetic number, because the mean of its divisors is an integer number (2782584).

Almost surely, 2^20670546 is an apocalyptic number.

20670546 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20670546 is an abundant number, since it is smaller than the sum of its proper divisors (23850798).

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

20670546 is a wasteful number, since it uses less digits than its factorization.

20670546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265025.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20670546 is about 4546.4872154225. The cubic root of 20670546 is about 274.4420466838.

The spelling of 20670546 in words is "twenty million, six hundred seventy thousand, five hundred forty-six".