20201907 has 16 divisors (see below), whose sum is σ = 29826432. Its totient is φ = 12059520.

The previous prime is 20201897. The next prime is 20201911. The reversal of 20201907 is 70910202.

It is a happy number.

It is not a de Polignac number, because 20201907 - 2⁴ = 20201891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20201917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2358 + ... + 6779.

It is an arithmetic number, because the mean of its divisors is an integer number (1864152).

Almost surely, 2^20201907 is an apocalyptic number.

20201907 is a deficient number, since it is larger than the sum of its proper divisors (9624525).

20201907 is a wasteful number, since it uses less digits than its factorization.

20201907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9218.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 20201907 is about 4494.6531568075. The cubic root of 20201907 is about 272.3521381708.

The spelling of 20201907 in words is "twenty million, two hundred one thousand, nine hundred seven".