20146907 has 16 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 17497440.

The previous prime is 20146831. The next prime is 20146927. The reversal of 20146907 is 70964102.

It is a cyclic number.

It is not a de Polignac number, because 20146907 - 2¹⁸ = 19884763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20146907.

It is not an unprimeable number, because it can be changed into a prime (20146927) 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, 23594 + ... + 24432.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^20146907 is an apocalyptic number.

20146907 is a deficient number, since it is larger than the sum of its proper divisors (2835493).

20146907 is a wasteful number, since it uses less digits than its factorization.

20146907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20146907 is about 4488.5306058887. The cubic root of 20146907 is about 272.1047525807.

The spelling of 20146907 in words is "twenty million, one hundred forty-six thousand, nine hundred seven".